diff --git a/config/nacos/local/baiyue-common.yml b/config/nacos/local/baiyue-common.yml
index 9af5a8d4a..5acc5cbe2 100644
--- a/config/nacos/local/baiyue-common.yml
+++ b/config/nacos/local/baiyue-common.yml
@@ -40,6 +40,8 @@ spring:
       timeout: ${REDIS_TIMEOUT:3s}
   cloud:
     nacos.discovery:
+      # Local services must stay reachable through the gateway when VPN adapters change priority.
+      ip: ${NACOS_DISCOVERY_IP:127.0.0.1}
       group: ${NACOS_GROUP:BAIYUE}
       namespace: ${NACOS_NAMESPACE:public}
     openfeign:
diff --git a/deploy/sql/海外区域统一增量-MySQL8.sql b/deploy/sql/海外区域统一增量-MySQL8.sql
index 4249d4ce3..40a84bd1b 100644
--- a/deploy/sql/海外区域统一增量-MySQL8.sql
+++ b/deploy/sql/海外区域统一增量-MySQL8.sql
@@ -2189,7 +2189,7 @@ CREATE TABLE ll_relabel_application (
   PRIMARY KEY (id),
   UNIQUE KEY uk_ll_relabel_application_no (customer_id,relabel_no),
   UNIQUE KEY uk_ll_relabel_application_idempotency (customer_id,idempotency_key),
-  UNIQUE KEY uk_ll_relabel_application_order (lastleg_order_id),
+  KEY idx_ll_relabel_application_order (lastleg_order_id),
   KEY idx_ll_relabel_application_list (customer_id,status,created_at),
   KEY idx_ll_relabel_application_customer (customer_id,customer_order_no),
   KEY idx_ll_relabel_application_warehouse (customer_id,overseas_warehouse_id)
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/dto/LastlegOrderSummary.java b/lastleg-service/src/main/java/com/baiyue/lastleg/dto/LastlegOrderSummary.java
index ede78069f..5d7ef8417 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/dto/LastlegOrderSummary.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/dto/LastlegOrderSummary.java
@@ -72,6 +72,8 @@ public record LastlegOrderSummary(
     String customerRemark,
     String warehouseRemark,
     LocalDateTime createdAt,
-    LocalDateTime updatedAt
+    LocalDateTime updatedAt,
+    @Schema(description = "同一主单关联的全部换标子单及各自状态，按创建时间排序")
+    List<RelabelSubOrder> relabelApplications
 ) {
 }
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/dto/RelabelSubOrder.java b/lastleg-service/src/main/java/com/baiyue/lastleg/dto/RelabelSubOrder.java
new file mode 100644
index 000000000..b9e4bac5e
--- /dev/null
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/dto/RelabelSubOrder.java
@@ -0,0 +1,7 @@
+package com.baiyue.lastleg.dto;
+
+import java.time.LocalDateTime;
+
+/** A relabel application keeps its own status within the received parent order. */
+public record RelabelSubOrder(Long lastlegOrderId, String relabelNo, String status,
+                             Integer quantity, LocalDateTime createdAt) { }
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/mapper/LastlegOrderMapper.java b/lastleg-service/src/main/java/com/baiyue/lastleg/mapper/LastlegOrderMapper.java
index 2fb5bc742..26dd83ad7 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/mapper/LastlegOrderMapper.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/mapper/LastlegOrderMapper.java
@@ -16,6 +16,11 @@ import java.math.BigDecimal;
 
 @Mapper
 public interface LastlegOrderMapper extends BaseMapper<LastlegOrder> {
+    @Select("<script>SELECT r.lastleg_order_id,r.relabel_no,r.status,r.notified_package_count AS quantity,r.created_at " +
+        "FROM ll_relabel_application r JOIN ll_order o ON o.id=r.lastleg_order_id AND o.customer_id=r.customer_id " +
+        "WHERE r.lastleg_order_id IN <foreach collection='orderIds' item='id' open='(' separator=',' close=')'>#{id}</foreach> " +
+        "ORDER BY r.created_at,r.id</script>")
+    List<com.baiyue.lastleg.dto.RelabelSubOrder> findRelabelSubOrders(@Param("orderIds") List<Long> orderIds);
     String WAREHOUSE_FILTER_SQL = "(LOWER(TRIM(overseas_warehouse_code)) LIKE CONCAT('%',LOWER({0}),'%') " +
         "OR LOWER(TRIM(overseas_warehouse_name)) LIKE CONCAT('%',LOWER({0}),'%'))";
 
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/dto/RelabelResponses.java b/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/dto/RelabelResponses.java
index 8e6052f4a..051a9659f 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/dto/RelabelResponses.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/dto/RelabelResponses.java
@@ -38,7 +38,7 @@ public final class RelabelResponses {
                                      String destinationFbaWarehouseName, String skuCode, String productNameZh,
                                      long availablePackages, long version, List<InventoryPosition> positions,
                                      String sourceType, Long returnCartonId, String cartonMark,
-                                     List<SkuItem> skuItems) {}
+                                     List<SkuItem> skuItems, long relabelledPackages) {}
     public record HistoricalOrder(Long id, String orderNo, String sourceOrderNo, String outboundOrderNo,
                                   String relabelOrderNo, String orderType, String status, Integer packageCount,
                                   LocalDateTime createdAt) {}
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/service/RelabelApplicationService.java b/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/service/RelabelApplicationService.java
index 7869543ee..d7e0a524e 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/service/RelabelApplicationService.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/relabel/service/RelabelApplicationService.java
@@ -260,7 +260,7 @@ public class RelabelApplicationService implements WalletResultHandler {
                 balance.getOverseasWarehouseCode(), balance.getOverseasWarehouseName(),
                 balance.getDestinationWarehouseCode(), balance.getDestinationWarehouseName(), balance.getSkuCode(),
                 balance.getProductNameZh(), available, value(balance.getVersion()), positions,
-                "INBOUND", null, null, List.of());
+                "INBOUND", null, null, List.of(), 0);
         }).filter(candidate -> candidate.availablePackages() > 0).toList());
         for (ReturnInventoryCarton carton : returnCartons.findAvailable(customerId, operationWarehouseId.trim())) {
             String keyword = trim(inboundCode);
@@ -269,19 +269,23 @@ public class RelabelApplicationService implements WalletResultHandler {
                 && !containsIgnoreCase(carton.getSourceReturnNo(), keyword)) continue;
             List<RelabelResponses.SkuItem> cartonSkus = returnCartonItems.listCarton(carton.getId()).stream()
                 .filter(item -> value(item.getQuantity()) > 0)
-                .map(item -> new RelabelResponses.SkuItem(item.getSkuCode(), null,
-                    Math.toIntExact(item.getQuantity()), null)).toList();
+                .map(item -> {
+                    long used = returnCartons.relabelledQuantity(carton.getId(), item.getSkuCode());
+                    long remaining = value(item.getQuantity()) - used;
+                    return new RelabelResponses.SkuItem(item.getSkuCode(), null,
+                        Math.toIntExact(Math.max(remaining, 0)), null);
+                }).filter(item -> item.quantity() > 0).toList();
             if (cartonSkus.isEmpty()) continue;
             String skuCodes = cartonSkus.stream().map(RelabelResponses.SkuItem::skuCode)
                 .collect(Collectors.joining(","));
-            long availablePackages = value(carton.getTotalQuantity());
-            if (availablePackages <= 0) {
-                availablePackages = cartonSkus.stream().mapToLong(RelabelResponses.SkuItem::quantity).sum();
-            }
+            long availablePackages = cartonSkus.stream().mapToLong(RelabelResponses.SkuItem::quantity).sum();
+            if (availablePackages <= 0) continue;
+            long relabelledPackages = carton.getTotalQuantity() == null ? 0
+                : Math.max(0, carton.getTotalQuantity() - availablePackages);
             result.add(new RelabelResponses.InventoryCandidate(null, null, carton.getSourceReturnNo(),
                 null, carton.getOverseasWarehouseId(), null, null, carton.getDestinationWarehouseCode(),
                 carton.getDestinationWarehouseName(), skuCodes, "退货入库库存", availablePackages, 0, List.of(),
-                "RETURN_CARTON", carton.getId(), carton.getCartonMark(), cartonSkus));
+                "RETURN_CARTON", carton.getId(), carton.getCartonMark(), cartonSkus, relabelledPackages));
         }
         return result;
     }
@@ -380,9 +384,10 @@ public class RelabelApplicationService implements WalletResultHandler {
                 if (!"AVAILABLE".equals(carton.getStatus()) || carton.getRelabelApplicationId() != null) {
                     throw conflict("仓库唛头 " + carton.getCartonMark() + " 已不可用于换标");
                 }
+                long previouslyRelabelled = returnCartons.relabelledQuantity(carton.getId(), item.skuCode());
                 long requestedPackages = selectedReturnPackages.merge(carton.getId(),
                     (long) item.notifiedPackageCount(), Math::addExact);
-                if (requestedPackages > value(carton.getTotalQuantity())) {
+                if (requestedPackages + previouslyRelabelled > value(carton.getTotalQuantity())) {
                     throw conflict("退货托盘 " + carton.getCartonMark() + " 可用箱数不足");
                 }
                 sources.add(new SourceInventory(item, null, carton));
@@ -455,9 +460,9 @@ public class RelabelApplicationService implements WalletResultHandler {
         applications.insert(application);
 
         for (ReturnInventoryCarton carton : selectedReturnCartons.values()) {
-            carton.setRelabelApplicationId(applicationId); carton.setRelabelNo(relabelNo);
-            carton.setRelabelStatus("PENDING"); carton.setStatus("RELABEL_PENDING"); carton.setUpdatedAt(now);
-            returnCartons.updateById(carton);
+            if (returnCartons.markRelabelPending(carton.getId(), applicationId, relabelNo, now) != 1) {
+                throw conflict("退货箱状态已变化，请刷新后重试");
+            }
         }
 
         if (requiresWallet) {
@@ -600,6 +605,7 @@ public class RelabelApplicationService implements WalletResultHandler {
             }
         }
         for (LastlegOrder order : linkedOrders) {
+            if ("RETURN_RELABEL".equals(order.getOrderType()) && !Objects.equals(order.getRelabelOrderNo(), application.getRelabelNo())) continue;
             String orderBefore = order.getCurrentStatus();
             String mainStatus = "RELABEL_APPLICATION".equals(order.getOrderType())
                 ? "WAIT_RELABEL" : orderBefore;
@@ -612,8 +618,7 @@ public class RelabelApplicationService implements WalletResultHandler {
             };
             // Reviewing/processing a return relabel must not move the already
             // completed inbound order back to assignment or relabel waiting.
-            if ("RETURN_RELABEL".equals(order.getOrderType())
-                && !Set.of("COMPLETED", "REJECTED", "CANCELLED").contains(next)) {
+            if ("RETURN_RELABEL".equals(order.getOrderType())) {
                 orderStatus = "INBOUND_COMPLETED";
             }
             order.setCurrentStatus(orderStatus);
@@ -703,6 +708,7 @@ public class RelabelApplicationService implements WalletResultHandler {
         application.setStatus("PROCESSING"); application.setFulfillmentStatus("WAIT_RELABEL");
         application.setUpdatedAt(LocalDateTime.now()); applications.updateById(application);
         for (LastlegOrder order : tailOrders(application)) {
+            if ("RETURN_RELABEL".equals(order.getOrderType()) && !Objects.equals(order.getRelabelOrderNo(), application.getRelabelNo())) continue;
             order.setRelabelStatus("PROCESSING"); order.setSubOrderStatus("RELABEL:PROCESSING");
             order.setUpdatedAt(LocalDateTime.now()); orders.updateById(order);
         }
@@ -748,9 +754,18 @@ public class RelabelApplicationService implements WalletResultHandler {
         }
         application.setUpdatedAt(now);
         applications.updateById(application);
+        WarehouseTransferOrder linkedTransfer = warehouseTransfers == null ? null
+            : warehouseTransfers.lockByRelabelNo(customerId, relabelNo);
         for (LastlegOrder order : tailOrders(application)) {
+            if ("RETURN_RELABEL".equals(order.getOrderType()) && !Objects.equals(order.getRelabelOrderNo(), application.getRelabelNo())) continue;
+            // 仓储转运尾程单由下方按转运目的仓一次性写入精确状态，避免先落入通用状态。
+            if (linkedTransfer != null && "WAIT_RELABEL".equals(linkedTransfer.getStatus())
+                && Objects.equals(order.getId(), linkedTransfer.getLastlegOrderId())) continue;
             String orderBefore = order.getCurrentStatus();
-            order.setCurrentStatus(requiresOutbound ? "PENDING_ASSIGNMENT" : "COMPLETED");
+            // 换标确认时货物已经完成入库，不得退回最初建单的“待分配”。
+            // 独立换标先进入待出库；仓储转运会在下方按目的仓进一步收敛为待排车或待确认目的仓。
+            order.setCurrentStatus("RETURN_RELABEL".equals(order.getOrderType()) ? "INBOUND_COMPLETED"
+                : requiresOutbound ? "WAIT_OUTBOUND" : "COMPLETED");
             order.setSubOrderStatus("RELABEL:" + application.getFulfillmentStatus());
             order.setRelabelStatus("COMPLETED");
             order.setUpdatedAt(now);
@@ -774,13 +789,16 @@ public class RelabelApplicationService implements WalletResultHandler {
             ReturnInventoryCarton carton = returnCartons.lockId(item.getReturnCartonId());
             if (carton == null || !Objects.equals(carton.getRelabelApplicationId(), application.getId())) continue;
             carton.setRelabelStatus("COMPLETED"); carton.setRelabelCompletedAt(now);
+            // 换标已完成后释放“当前申请占用”关系，但保留 COMPLETED 作为历史状态。
+            // 否则退货箱虽显示 AVAILABLE，下一次贴标申请仍会被旧 relabel_application_id 拦截。
+            carton.setRelabelApplicationId(null); carton.setRelabelNo(null);
             carton.setStatus("AVAILABLE"); carton.setUpdatedAt(now); returnCartons.updateById(carton);
         }
         insertHistory(customerId, application.getId(), before, application.getStatus(), operatorId,
             request.remark(), now);
         // 仓储转运换标在客户确认后立即恢复为可排车，发车时再转为 OUTBOUNDED。
-        if (warehouseTransfers != null) {
-            WarehouseTransferOrder transfer = warehouseTransfers.lockByRelabelNo(customerId, relabelNo);
+        if (linkedTransfer != null) {
+            WarehouseTransferOrder transfer = linkedTransfer;
             if (transfer != null && "WAIT_RELABEL".equals(transfer.getStatus())) {
                 Set<String> destinations = relabelItems.stream()
                     .map(RelabelItem::getDestinationFbaWarehouseCode)
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/dto/ReturnOrderResponses.java b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/dto/ReturnOrderResponses.java
index 8011f4288..c934a1eaa 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/dto/ReturnOrderResponses.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/dto/ReturnOrderResponses.java
@@ -8,7 +8,8 @@ public final class ReturnOrderResponses {
     public record Summary(String returnNo, String lastlegOrderNo, String overseasWarehouseId,
                           String warehouseContactName, String warehouseContactPhone, String customerReferenceNo, String status,
                           int skuTypes, long expectedQuantity, long receivedQuantity, boolean needRelabel,
-                          String relabelNo, String relabelStatus, String discrepancyReason, LocalDateTime createdAt) { }
+                          String relabelNo, String relabelStatus, String discrepancyReason, LocalDateTime createdAt,
+                          List<com.baiyue.lastleg.dto.RelabelSubOrder> relabelApplications) { }
     public record Item(String skuCode, String productNameZh, long expectedQuantity,
                        long receivedQuantity) { }
     public record Detail(Summary order, String remark, List<Item> items, List<Receipt> receipts, List<PalletDetail> pallets, List<Photo> photos) { }
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnInventoryCartonMapper.java b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnInventoryCartonMapper.java
index ac0540219..19b529321 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnInventoryCartonMapper.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnInventoryCartonMapper.java
@@ -36,6 +36,12 @@ public interface ReturnInventoryCartonMapper extends BaseMapper<ReturnInventoryC
     @Select("SELECT * FROM ll_return_inventory_carton WHERE id=#{id} FOR UPDATE")
     ReturnInventoryCarton lockId(@Param("id") long id);
 
+    @Select("SELECT COALESCE(SUM(ri.notified_package_count),0) FROM ll_relabel_item ri " +
+        "JOIN ll_relabel_application ra ON ra.id=ri.application_id " +
+        "WHERE ri.return_carton_id=#{cartonId} AND ri.sku_code=#{skuCode} " +
+        "AND ra.status NOT IN ('CANCELLED','REJECTED')")
+    long relabelledQuantity(@Param("cartonId") long cartonId, @Param("skuCode") String skuCode);
+
     @Update("UPDATE ll_return_inventory_carton SET total_quantity=#{remaining},sku_types=#{skuTypes},status='AVAILABLE'," +
         "relabel_application_id=NULL,relabel_no=NULL,relabel_status=NULL,updated_at=NOW(3) " +
         "WHERE id=#{id} AND customer_id=#{customerId} AND relabel_application_id=#{applicationId} " +
@@ -44,6 +50,12 @@ public interface ReturnInventoryCartonMapper extends BaseMapper<ReturnInventoryC
                        @Param("applicationId") long applicationId, @Param("remaining") long remaining,
                        @Param("skuTypes") int skuTypes);
 
+    @Update("UPDATE ll_return_inventory_carton SET relabel_application_id=#{applicationId},relabel_no=#{relabelNo}," +
+        "relabel_status='PENDING',status='RELABEL_PENDING',updated_at=#{updatedAt} " +
+        "WHERE id=#{id} AND status='AVAILABLE' AND sku_types>0 AND total_quantity>0 AND relabel_application_id IS NULL")
+    int markRelabelPending(@Param("id") long id, @Param("applicationId") long applicationId,
+                           @Param("relabelNo") String relabelNo, @Param("updatedAt") java.time.LocalDateTime updatedAt);
+
     @Select("SELECT * FROM ll_return_inventory_carton WHERE source_receipt_id=#{receiptId} LIMIT 1")
     ReturnInventoryCarton findReceipt(@Param("receiptId") long receiptId);
 
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnOrderMapper.java b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnOrderMapper.java
index 3eb209b27..ea900cb9e 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnOrderMapper.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/mapper/ReturnOrderMapper.java
@@ -13,6 +13,8 @@ public interface ReturnOrderMapper extends BaseMapper<ReturnOrder> {
     ReturnOrder findKey(@Param("customerId") String customerId, @Param("key") String key);
     @Select("SELECT * FROM ll_return_order WHERE customer_id=#{customerId} AND return_no=#{returnNo} LIMIT 1")
     ReturnOrder findNo(@Param("customerId") String customerId, @Param("returnNo") String returnNo);
+    @Select("SELECT * FROM ll_return_order WHERE customer_id=#{customerId} AND return_no=#{returnNo} LIMIT 1 FOR UPDATE")
+    ReturnOrder lockCustomerNo(@Param("customerId") String customerId, @Param("returnNo") String returnNo);
     @Select("SELECT * FROM ll_return_order WHERE return_no=#{returnNo} LIMIT 1 FOR UPDATE")
     ReturnOrder lockNo(@Param("returnNo") String returnNo);
     @Select("SELECT * FROM ll_return_order WHERE return_no=#{returnNo} AND overseas_warehouse_id=#{warehouseId} " +
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptService.java b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptService.java
index 609534dc7..858536260 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptService.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptService.java
@@ -186,7 +186,9 @@ public class ReturnReceiptService {
             w.in(ReturnOrder::getId, ids);
         }
         Page<ReturnOrder> result = orders.selectPage(Page.of(query.page(), query.size()), w);
-        return new PageResult<>(result.getRecords().stream().map(this::summary).toList(), result.getCurrent(),
+        var relabels = relabelSubOrders(result.getRecords());
+        return new PageResult<>(result.getRecords().stream().map(order -> summary(order,
+            relabels.getOrDefault(order.getLastlegOrderId(), List.of()))).toList(), result.getCurrent(),
             result.getSize(), result.getTotal(), result.getPages());
     }
 
@@ -216,7 +218,7 @@ public class ReturnReceiptService {
         }).toList();
         List<ReturnOrderResponses.Photo> photos = photoList(order).stream()
             .map(file -> new ReturnOrderResponses.Photo(file.fileId(), file.fileName(), file.contentType(), file.sizeBytes())).toList();
-        return new ReturnOrderResponses.Detail(summary(order), order.getRemark(), items, receiptViews, palletViews, photos);
+        return new ReturnOrderResponses.Detail(summary(order, relabelSubOrders(List.of(order)).getOrDefault(order.getLastlegOrderId(), List.of())), order.getRemark(), items, receiptViews, palletViews, photos);
     }
 
     public com.baiyue.lastleg.relabel.pda.gateway.RelabelPhotoFileGateway.DownloadedFile downloadPhoto(String customerId, String returnNo, long fileId) {
@@ -265,7 +267,7 @@ public class ReturnReceiptService {
     @Transactional
     public ReturnOrderResponses.RelabelCreated createRelabel(String customerId, String operatorId, String returnNo,
                                                               ReturnOrderRequests.RelabelCreate request) {
-        ReturnOrder order = orders.findNo(customerId, text(returnNo));
+        ReturnOrder order = orders.lockCustomerNo(customerId, text(returnNo));
         if (order == null) throw notFound("退货单不存在");
         if (!COMPLETED.equals(order.getStatus())) throw conflict("退货单尚未完成签收");
         String fileScope = norm(request.fileScope());
@@ -273,9 +275,14 @@ public class ReturnReceiptService {
         String key = text(request.idempotencyKey());
         String requestHash = hash(request);
         RelabelApplication replay = relabelApplications.findKey(customerId, key);
-        if (replay != null) return new ReturnOrderResponses.RelabelCreated(replay.getRelabelNo(), replay.getId(),
-            order.getReturnNo(), request.items().stream().map(ReturnOrderRequests.RelabelItem::skuCode).toList(), replay.getStatus());
-        if (text(order.getRelabelNo()) != null) throw conflict("当前退货单已经生成贴标申请");
+        if (replay != null) {
+            if (!order.getReturnNo().equals(replay.getCustomerOrderNo()) || !requestHash.equals(replay.getRequestHash()))
+                throw conflict("相同幂等键的贴标申请内容不一致");
+            return new ReturnOrderResponses.RelabelCreated(replay.getRelabelNo(), replay.getId(),
+                order.getReturnNo(), request.items().stream().map(ReturnOrderRequests.RelabelItem::skuCode).toList(), replay.getStatus());
+        }
+        // The order keeps the latest application reference, not an order-wide inventory lock.
+        // Each new application must still allocate only unlabelled, available carton quantities below.
         var destination = fbaWarehouseValidator.required(request.destinationFbaWarehouseId(), request.destinationFbaWarehouseCode(), null);
         Map<String, ReturnOrderItem> receivedBySku = orderItems.lockOrder(order.getId()).stream()
             .collect(java.util.stream.Collectors.toMap(item -> norm(item.getSkuCode()), item -> item));
@@ -311,8 +318,10 @@ public class ReturnReceiptService {
         tail.setRelabelStatus("PENDING_REVIEW");
         tail.setSubOrderStatus("RETURN_RELABEL:PENDING_REVIEW");
         tail.setCurrentStatus("RETURN_RELABEL".equals(tail.getOrderType()) ? "INBOUND_COMPLETED" : tail.getCurrentStatus());
-        tail.setPackageCount(Math.toIntExact(totalQuantity));
-        tail.setProductQuantity(Math.toIntExact(totalQuantity));
+        if (!"RETURN_RELABEL".equals(tail.getOrderType())) {
+            tail.setPackageCount(Math.toIntExact(totalQuantity));
+            tail.setProductQuantity(Math.toIntExact(totalQuantity));
+        }
         tail.setUpdatedAt(now);
         lastlegOrders.updateById(tail);
         RelabelApplication app = new RelabelApplication(); app.setId(appId); app.setCustomerId(customerId); app.setRelabelNo(relabelNo); app.setLastlegOrderId(tail.getId());
@@ -331,6 +340,7 @@ public class ReturnReceiptService {
                 long skuQuantity = cartonItems.listCarton(candidate.getId()).stream()
                     .filter(line -> norm(requested.skuCode()).equals(norm(line.getSkuCode())))
                     .mapToLong(line -> value(line.getQuantity())).sum();
+                skuQuantity -= cartons.relabelledQuantity(candidate.getId(), norm(requested.skuCode()));
                 if (skuQuantity <= 0) continue;
                 ReturnInventoryCarton carton = selectedCartons.computeIfAbsent(candidate.getId(), ignored -> cartons.lockId(candidate.getId()));
                 if (carton == null || !"AVAILABLE".equals(carton.getStatus()) || carton.getRelabelApplicationId() != null)
@@ -551,10 +561,16 @@ public class ReturnReceiptService {
         return new PdaReturnReceiptResponses.Confirmed(order.getReturnNo(), receipt.getReceiptNo(), receipt.getReceiptBatchNo(), receipt.getPalletCode(),
             order.getStatus(), completed, value(order.getExpectedQuantity()), value(order.getReceivedQuantity()), receipt.getSignedAt());
     }
-    private ReturnOrderResponses.Summary summary(ReturnOrder order) { return new ReturnOrderResponses.Summary(order.getReturnNo(), order.getLastlegOrderNo(),
+    private Map<Long, List<com.baiyue.lastleg.dto.RelabelSubOrder>> relabelSubOrders(List<ReturnOrder> values) {
+        var ids = values.stream().map(ReturnOrder::getLastlegOrderId).filter(java.util.Objects::nonNull).distinct().toList();
+        if (ids.isEmpty()) return java.util.Collections.emptyMap();
+        var rows = lastlegOrders.findRelabelSubOrders(ids);
+        return rows == null ? java.util.Collections.emptyMap() : rows.stream().collect(java.util.stream.Collectors.groupingBy(com.baiyue.lastleg.dto.RelabelSubOrder::lastlegOrderId));
+    }
+    private ReturnOrderResponses.Summary summary(ReturnOrder order, List<com.baiyue.lastleg.dto.RelabelSubOrder> relabelApplications) { return new ReturnOrderResponses.Summary(order.getReturnNo(), order.getLastlegOrderNo(),
         order.getOverseasWarehouseId(), order.getWarehouseContactName(), order.getWarehouseContactPhone(), order.getCustomerReferenceNo(), order.getStatus(),
         order.getExpectedSkuTypes() == null ? 0 : order.getExpectedSkuTypes(), value(order.getExpectedQuantity()),
-        value(order.getReceivedQuantity()), Boolean.TRUE.equals(order.getNeedRelabel()), order.getRelabelNo(), order.getRelabelStatus(), order.getDiscrepancyReason(), order.getCreatedAt()); }
+        value(order.getReceivedQuantity()), Boolean.TRUE.equals(order.getNeedRelabel()), order.getRelabelNo(), order.getRelabelStatus(), order.getDiscrepancyReason(), order.getCreatedAt(), relabelApplications); }
     private ReturnOrderResponses.Item item(ReturnOrderItem item) { return new ReturnOrderResponses.Item(item.getSkuCode(),
         item.getProductNameZh(), value(item.getExpectedQuantity()), value(item.getReceivedQuantity())); }
     private PdaReturnReceiptResponses.Item pdaItem(ReturnOrderItem item) { return new PdaReturnReceiptResponses.Item(item.getSkuCode(),
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/service/LastlegOrderService.java b/lastleg-service/src/main/java/com/baiyue/lastleg/service/LastlegOrderService.java
index 49812a1c3..214ec7563 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/service/LastlegOrderService.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/service/LastlegOrderService.java
@@ -96,10 +96,12 @@ public class LastlegOrderService {
         Map<String, String> containerNodes = containerNodes(page.getRecords());
         Map<Long, String> dispatchStatuses = dispatchStatuses(page.getRecords());
         Map<Long, LastlegOrderMapper.OrderWeightRow> weights = orderWeights(page.getRecords());
+        Map<Long, List<com.baiyue.lastleg.dto.RelabelSubOrder>> relabels = relabelSubOrders(page.getRecords());
         return new PageResult<>(page.getRecords().stream().map(order -> summary(order, mergeRelations.get(order.getId()),
                 StringUtils.hasText(order.getSourceContainerBookingId())
                     ? containerNodes.get(order.getSourceContainerBookingId()) : null,
-                dispatchStatuses.getOrDefault(order.getId(), "UNSCHEDULED"), weights.get(order.getId()))).toList(),
+                dispatchStatuses.getOrDefault(order.getId(), "UNSCHEDULED"), weights.get(order.getId()),
+                relabels.getOrDefault(order.getId(), List.of()))).toList(),
             page.getCurrent(), page.getSize(), page.getTotal(), page.getPages());
     }
 
@@ -353,7 +355,7 @@ public class LastlegOrderService {
             .sorted(java.util.Comparator.comparingInt(value -> MANUAL_NODE_CODES.indexOf(value.nodeCode()))).toList();
         return new LastlegOrderDetailResponse(summary(order, palletMergeRelations(List.of(order)).get(order.getId()),
             containerNode(order), dispatchStatuses(List.of(order)).getOrDefault(order.getId(), "UNSCHEDULED"),
-            orderWeights(List.of(order)).get(order.getId())), manualNodes, cargo, history.stream()
+            orderWeights(List.of(order)).get(order.getId()), relabelSubOrders(List.of(order)).getOrDefault(order.getId(), List.of())), manualNodes, cargo, history.stream()
             .map(value -> new LastlegOrderDetailResponse.History(value.getId(), value.getFromStatus(),
                 value.getToStatus(), value.getRemark(), value.getCreatedAt())).toList(), fees, operations.stream()
             .map(value -> new LastlegOrderDetailResponse.Operation(value.getId(), value.getOperationNode(),
@@ -577,7 +579,10 @@ public class LastlegOrderService {
                 .like(LastlegOrder::getOrderNo, query.orderNo())
                 .or()
                 .like(LastlegOrder::getSourceOrderNo, query.orderNo()))
-            .like(StringUtils.hasText(relabelNo), LastlegOrder::getRelabelOrderNo, relabelNo)
+            .and(StringUtils.hasText(relabelNo), nested -> nested
+                .like(LastlegOrder::getRelabelOrderNo, relabelNo)
+                .or().apply("EXISTS (SELECT 1 FROM ll_relabel_application r WHERE r.lastleg_order_id=ll_order.id " +
+                    "AND r.customer_id=ll_order.customer_id AND r.relabel_no LIKE CONCAT('%',{0},'%'))", relabelNo))
             .eq(StringUtils.hasText(query.orderType()), LastlegOrder::getOrderType, query.orderType())
             .like(StringUtils.hasText(query.inboundCode()), LastlegOrder::getInboundCode, query.inboundCode())
             .like(StringUtils.hasText(query.lxCode()), LastlegOrder::getLxCode, query.lxCode())
@@ -637,9 +642,16 @@ public class LastlegOrderService {
         return rows.stream().collect(Collectors.toMap(LastlegOrderMapper.OrderWeightRow::orderId, row -> row));
     }
 
+    private Map<Long, List<com.baiyue.lastleg.dto.RelabelSubOrder>> relabelSubOrders(List<LastlegOrder> orders) {
+        if (orders.isEmpty()) return Map.of();
+        var rows = orderMapper.findRelabelSubOrders(orders.stream().map(LastlegOrder::getId).toList());
+        return rows == null ? Map.of() : rows.stream().collect(Collectors.groupingBy(com.baiyue.lastleg.dto.RelabelSubOrder::lastlegOrderId));
+    }
+
     private LastlegOrderSummary summary(LastlegOrder o, List<LastlegOrderMapper.PalletMergeRelationRow> relations,
                                          String containerNode, String dispatchStatus,
-                                         LastlegOrderMapper.OrderWeightRow weight) {
+                                         LastlegOrderMapper.OrderWeightRow weight,
+                                         List<com.baiyue.lastleg.dto.RelabelSubOrder> relabelApplications) {
         List<LastlegOrderMapper.PalletMergeRelationRow> related = relations == null ? List.of() : relations;
         return new LastlegOrderSummary(o.getId(), displayOrderNo(o), o.getOrderType(),
             LastlegOrderType.labelOf(o.getOrderType()), o.getDestinationType(), o.getSourceInboundId(),
@@ -657,7 +669,7 @@ public class LastlegOrderService {
             o.getPalletMergeFlag(), related.stream().map(LastlegOrderMapper.PalletMergeRelationRow::mergeGroupNo).distinct().findFirst().orElse(null),
             related.stream().map(LastlegOrderMapper.PalletMergeRelationRow::relatedInboundNo).filter(Objects::nonNull).distinct().toList(),
             o.getCurrentStatus(), o.getSubOrderStatus(), o.getPrivateRemark(),
-            o.getCustomerRemark(), o.getWarehouseRemark(), o.getCreatedAt(), o.getUpdatedAt());
+            o.getCustomerRemark(), o.getWarehouseRemark(), o.getCreatedAt(), o.getUpdatedAt(), relabelApplications);
     }
 
     private static Integer packageDifference(LastlegOrder order) {
diff --git a/lastleg-service/src/main/resources/db/lastleg.sql b/lastleg-service/src/main/resources/db/lastleg.sql
index f6f240715..16a0622b0 100644
--- a/lastleg-service/src/main/resources/db/lastleg.sql
+++ b/lastleg-service/src/main/resources/db/lastleg.sql
@@ -1826,7 +1826,7 @@ CREATE TABLE IF NOT EXISTS ll_relabel_application (
   PRIMARY KEY (id),
   UNIQUE KEY uk_ll_relabel_application_no (customer_id,relabel_no),
   UNIQUE KEY uk_ll_relabel_application_idempotency (customer_id,idempotency_key),
-  UNIQUE KEY uk_ll_relabel_application_order (lastleg_order_id),
+  KEY idx_ll_relabel_application_order (lastleg_order_id),
   KEY idx_ll_relabel_application_list (customer_id,status,created_at),
   KEY idx_ll_relabel_application_customer (customer_id,customer_order_no),
   KEY idx_ll_relabel_application_warehouse (customer_id,overseas_warehouse_id)
diff --git a/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml b/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml
index 0af7a9337..ee70f6513 100644
--- a/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml
+++ b/lastleg-service/src/main/resources/openapi/overseas-business-v1.yaml
@@ -228,7 +228,7 @@ paths:
         - { name: detained, in: query, schema: { type: boolean } }
         - { name: createdFrom, in: query, schema: { type: string, format: date-time } }
         - { name: createdTo, in: query, schema: { type: string, format: date-time } }
-      responses: { '200': { description: 统一 ApiResponse 包装的尾程订单分页；列表行 destinationType 为 FBA 或 OVERSEAS；inboundCode 仅返回真实来源入仓码，无入仓关系的换标申请和本土散板为空 } }
+      responses: { '200': { description: 统一 ApiResponse 包装的尾程订单分页；每行 relabelApplications 数组按创建时间返回所有换标子单的 relabelNo、status、quantity、createdAt，旧标量字段只代表最近一张；列表行 destinationType 为 FBA 或 OVERSEAS；inboundCode 仅返回真实来源入仓码，无入仓关系的换标申请和本土散板为空 } }
   /api/platform/v1/last-leg/orders/{id}:
     get:
       summary: 查询尾程订单详情
@@ -238,7 +238,7 @@ paths:
         - { name: id, in: path, required: true, schema: { type: integer, format: int64 } }
         - { name: customerId, in: query, required: false, schema: { type: string, pattern: '^[1-9][0-9]*$' } }
       responses:
-        '200': { description: 统一 ApiResponse 包装的尾程订单详情 }
+        '200': { description: 统一 ApiResponse 包装的尾程订单详情；order.relabelApplications 返回所有换标子单的独立状态和本次数量 }
         '404': { description: 尾程订单不存在或不属于查询客户 }
   /api/platform/v1/last-leg/orders/{id}/fees:
     post:
@@ -1524,7 +1524,7 @@ paths:
         - { name: trackingNo, in: query, schema: { type: string } }
         - { name: skuCode, in: query, schema: { type: string } }
         - { name: status, in: query, schema: { type: string, enum: [PENDING_RECEIPT, PARTIALLY_RECEIVED, COMPLETED] } }
-      responses: { '200': { description: 当前客户退货订单分页 } }
+      responses: { '200': { description: 当前客户退货订单分页；每行 relabelApplications 返回所有换标子单的 relabelNo、status、quantity、createdAt，主单 status 仍表示退货签收状态 } }
     post:
       summary: 客户创建退货预报订单
       description: 权限 merchant:overseas-warehouse:return-order:create；客户只预报不重复的 SKU 和预计数量，不要求提前知道快递单号；仓库 PDA 实收数量才是实际入库事实。系统退货编号由业务前缀和25位大写Base36完整随机UUID编码组成，退货单RT、签收单RR、批次RB、箱唛RC及退货主单RETU均独立生成，不编码内部ID、仓库或日期。幂等重放返回已保存的编号，不重新生成。
@@ -2691,6 +2691,15 @@ components:
         batchNo: { type: string, nullable: true }
         warehouseLocationCode: { type: string, nullable: true }
         availablePackages: { type: integer, format: int64 }
+    RelabelSubOrder:
+      type: object
+      description: 同一主单可分批生成多张换标申请；各自保留独立状态，取消或完成子单不会覆盖主单签收状态。
+      properties:
+        lastlegOrderId: { type: string }
+        relabelNo: { type: string }
+        status: { type: string }
+        quantity: { type: integer, description: 本次申请数量 }
+        createdAt: { type: string, format: date-time }
     RelabelHistoricalOrder:
       type: object
       properties:
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/RelabelContractTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/RelabelContractTest.java
index 6c594354e..bf90f8c2f 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/RelabelContractTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/RelabelContractTest.java
@@ -44,6 +44,12 @@ class RelabelContractTest {
         String migration = Files.readString(Path.of("..", "scripts", "db", "incremental.sql"), StandardCharsets.UTF_8).toLowerCase();
         String deployment = Files.readString(Path.of("..", "deploy", "sql", "海外区域统一增量-MySQL8.sql"),
             StandardCharsets.UTF_8).toLowerCase();
+        for (String schema : new String[] { baseline, deployment }) {
+            assertTrue(schema.contains("key idx_ll_relabel_application_order (lastleg_order_id)"));
+            assertFalse(schema.contains("unique key uk_ll_relabel_application_order"),
+                "One received return order must support multiple relabel applications for remaining stock");
+            assertTrue(schema.contains("unique key uk_ll_relabel_application_idempotency"));
+        }
         for (String schema : new String[] { baseline, migration }) {
             assertTrue(schema.contains("ll_relabel_application"));
             assertTrue(schema.contains("ll_relabel_item"));
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelApplicationServiceTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelApplicationServiceTest.java
index ec07e9bf0..6e5db795d 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelApplicationServiceTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelApplicationServiceTest.java
@@ -466,12 +466,13 @@ class RelabelApplicationServiceTest {
     }
 
     @Test
-    void completedReturnRelabelOrderEntersPendingAssignment() {
+    void completedReturnRelabelKeepsParentInboundCompleted() {
         RelabelApplication application = application(11L, "FBR-1", "10001", "key-1", "hash", RelabelApplicationService.READY_FOR_OUTBOUND);
         application.setLastlegOrderId(21L);
         application.setFulfillmentStatus("PRE_DISPATCH_CREATED");
         LastlegOrder order = order(21L, "10001", "LMO-RELABEL-1", "PROCESSING");
         order.setOrderType("RETURN_RELABEL");
+        order.setRelabelOrderNo("FBR-1");
         when(applications.lockNo("10001", "FBR-1")).thenReturn(application);
         stubDetail(application);
         when(orders.selectById(21L)).thenReturn(order);
@@ -481,10 +482,32 @@ class RelabelApplicationServiceTest {
 
         assertEquals("COMPLETED", application.getStatus());
         assertEquals("OUTBOUNDED", application.getFulfillmentStatus());
-        assertEquals("PENDING_ASSIGNMENT", order.getCurrentStatus());
+        assertEquals("INBOUND_COMPLETED", order.getCurrentStatus());
         assertEquals("COMPLETED", order.getRelabelStatus());
     }
 
+    @Test
+    void completingEarlierReturnRelabelDoesNotOverwriteLaterApplicationStatus() {
+        RelabelApplication application = application(11L, "FBR-FIRST", "10001", "key-1", "hash", RelabelApplicationService.READY_FOR_OUTBOUND);
+        application.setLastlegOrderId(21L);
+        application.setFulfillmentStatus("PRE_DISPATCH_CREATED");
+        LastlegOrder order = order(21L, "10001", "LMO-RELABEL-1", "INBOUND_COMPLETED");
+        order.setOrderType("RETURN_RELABEL");
+        order.setRelabelOrderNo("FBR-SECOND");
+        order.setRelabelStatus("PROCESSING");
+        when(applications.lockNo("10001", "FBR-FIRST")).thenReturn(application);
+        stubDetail(application);
+        when(orders.selectById(21L)).thenReturn(order);
+
+        service.changeStatus("10001", "FBR-FIRST", "operator-2",
+            new RelabelRequests.ChangeStatus("COMPLETED", "finished"));
+
+        assertEquals("COMPLETED", application.getStatus());
+        assertEquals("INBOUND_COMPLETED", order.getCurrentStatus());
+        assertEquals("PROCESSING", order.getRelabelStatus());
+        assertEquals("FBR-SECOND", order.getRelabelOrderNo());
+    }
+
     @Test
     void completingPartialRelabelReleasesOnlyNotifiedPackages() {
         RelabelApplication application = application(11L, "FBR-PARTIAL", "10001", "key-partial", "hash", RelabelApplicationService.READY_FOR_OUTBOUND);
@@ -508,8 +531,10 @@ class RelabelApplicationServiceTest {
     @Test
     void truckCustomerConfirmationIsIdempotentAndWaitsForPreDispatch() {
         RelabelApplication application = confirmationApplication("TRUCK", false);
+        LastlegOrder linked = order(21L, "10001", "LMO-RELABEL-1", "WAIT_RELABEL");
         when(applications.lockNo("10001", "FBR-1")).thenReturn(application);
         stubDetail(application);
+        when(orders.selectById(21L)).thenReturn(linked);
 
         service.confirmCompletion("10001", "FBR-1", "customer-1",
             new RelabelRequests.CustomerConfirm("confirm-1", "photos accepted"));
@@ -520,6 +545,7 @@ class RelabelApplicationServiceTest {
         verify(pdaTasks).updateWithVersion(review.capture(), eq(1));
         assertEquals("COMPLETED", review.getValue().getStatus());
         assertEquals("CONFIRMED", review.getValue().getReviewDecision());
+        assertEquals("WAIT_OUTBOUND", linked.getCurrentStatus());
         assertNull(application.getOutboundOrderNo());
         verify(outboundOrders, never()).insert(any(OutboundOrder.class));
 
@@ -555,6 +581,7 @@ class RelabelApplicationServiceTest {
     @Test
     void transferRelabelConfirmationReleasesTransferForDispatch() {
         RelabelApplication application = confirmationApplication("TRUCK", false);
+        application.setLastlegOrderId(88L);
         WarehouseTransferOrder transfer = new WarehouseTransferOrder();
         transfer.setId(77L); transfer.setCustomerId("10001"); transfer.setRelabelNo("FBR-1");
         transfer.setStatus("WAIT_RELABEL"); transfer.setLastlegOrderId(88L); transfer.setFbaWarehouseCode("ONT8");
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelReturnCartonCandidateTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelReturnCartonCandidateTest.java
index 163342279..de7433c01 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelReturnCartonCandidateTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/relabel/service/RelabelReturnCartonCandidateTest.java
@@ -38,6 +38,7 @@ class RelabelReturnCartonCandidateTest {
         cartonItem.setProductNameZh("退货商品"); cartonItem.setQuantity(12L);
         when(cartons.findAvailable("10001", "WH-1")).thenReturn(List.of(carton));
         when(cartonItems.listCarton(9001L)).thenReturn(List.of(cartonItem));
+        when(cartons.relabelledQuantity(9001L, "SKU-RETURN")).thenReturn(1L);
 
         List<RelabelResponses.InventoryCandidate> result = service.candidates("10001", "WH-1", "RC-WH");
 
@@ -45,8 +46,8 @@ class RelabelReturnCartonCandidateTest {
         assertEquals("RETURN_CARTON", result.get(0).sourceType());
         assertEquals(9001L, result.get(0).returnCartonId());
         assertEquals("RC-WH-0001", result.get(0).cartonMark());
-        assertEquals(12, result.get(0).availablePackages());
+        assertEquals(11, result.get(0).availablePackages());
         assertEquals("SKU-RETURN", result.get(0).skuItems().get(0).skuCode());
-        assertEquals(12, result.get(0).skuItems().get(0).quantity());
+        assertEquals(11, result.get(0).skuItems().get(0).quantity());
     }
 }
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptServiceTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptServiceTest.java
index 2bc877ac7..7e9d1415e 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptServiceTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/service/ReturnReceiptServiceTest.java
@@ -93,6 +93,22 @@ class ReturnReceiptServiceTest {
         identity = new PdaWarehouseIdentity("operator-1", "仓管员", 10L);
     }
 
+    @Test
+    void detailKeepsEveryRelabelApplicationAndItsOwnStatus() {
+        ReturnOrder order = order("RT-MULTI", "10", "COMPLETED", 90, 90);
+        order.setLastlegOrderId(99L);
+        when(orders.findNo("customer-1", "RT-MULTI")).thenReturn(order);
+        var completed = new com.baiyue.lastleg.dto.RelabelSubOrder(99L, "RL-FIRST", "COMPLETED", 10, null);
+        var processing = new com.baiyue.lastleg.dto.RelabelSubOrder(99L, "RL-SECOND", "PROCESSING", 5, null);
+        when(lastlegOrders.findRelabelSubOrders(List.of(99L))).thenReturn(List.of(completed, processing));
+
+        var result = service.detail("customer-1", "RT-MULTI").order();
+
+        assertEquals("COMPLETED", result.status());
+        assertEquals(List.of(completed, processing), result.relabelApplications());
+        assertEquals(90L, result.receivedQuantity());
+    }
+
     @Test
     void merchantPhotoDownloadUsesAuthenticatedCustomerAndResolvedReturnOrder() {
         ReflectionTestUtils.setField(service, "photoFiles", photoFiles);
@@ -128,12 +144,26 @@ class ReturnReceiptServiceTest {
     }
 
     private void verifyMultiSkuRelabel(long firstQuantity, long secondQuantity) {
+        verifyMultiSkuRelabel(firstQuantity, secondQuantity, false);
+    }
+
+    @Test
+    void previouslyRelabelledReturnCanLabelItsRemainingAvailableGoods() {
+        verifyMultiSkuRelabel(10, 5, true);
+    }
+
+    private void verifyMultiSkuRelabel(long firstQuantity, long secondQuantity, boolean previousRelabel) {
         ReturnOrder order = order("RT-MULTI", "10", "COMPLETED", 90, 90);
+        if (previousRelabel) {
+            order.setRelabelApplicationId(88L);
+            order.setRelabelNo("RL-PREVIOUS");
+            order.setRelabelStatus("COMPLETED");
+        }
         order.setLastlegOrderId(99L);
         LastlegOrder tail = new LastlegOrder(); tail.setId(99L);
         ReturnInventoryCarton first = returnCarton(101L, "RC-A", "P-1", 50);
         ReturnInventoryCarton second = returnCarton(102L, "RC-B", "P-2", 40);
-        when(orders.findNo("customer-1", "RT-MULTI")).thenReturn(order);
+        when(orders.lockCustomerNo("customer-1", "RT-MULTI")).thenReturn(order);
         when(orderItems.lockOrder(1L)).thenReturn(List.of(item(11L, "SKU-A", 50, 50), item(12L, "SKU-B", 40, 40)));
         when(fbaWarehouseValidator.required("200", "XLX6", null)).thenReturn(
             new FbaWarehouseValidator.VerifiedFbaWarehouse(200L, "XLX6", "FBA XLX6", "US", "CA"));
@@ -152,6 +182,7 @@ class ReturnReceiptServiceTest {
                 "SKU_TOTAL", "200", "XLX6", "multi-key", "multi SKU acceptance"));
 
         assertEquals("RL-MULTI", result.relabelNo());
+        assertEquals("RL-MULTI", order.getRelabelNo());
         var application = ArgumentCaptor.forClass(RelabelApplication.class);
         verify(relabelApplications).insert(application.capture());
         assertEquals(firstQuantity + secondQuantity, application.getValue().getNotifiedPackageCount().longValue());
@@ -174,6 +205,45 @@ class ReturnReceiptServiceTest {
         return carton;
     }
 
+    @Test
+    void secondRelabelCannotAllocateAlreadyLabelledQuantity() {
+        ReturnOrder order = order("RT-MULTI", "10", "COMPLETED", 100, 100);
+        order.setLastlegOrderId(99L); order.setRelabelNo("RL-PREVIOUS");
+        LastlegOrder tail = new LastlegOrder(); tail.setId(99L);
+        ReturnInventoryCarton carton = returnCarton(101L, "RC-A", "P-1", 100);
+        when(orders.lockCustomerNo("customer-1", "RT-MULTI")).thenReturn(order);
+        when(orderItems.lockOrder(1L)).thenReturn(List.of(item(11L, "SKU-A", 100, 100)));
+        when(fbaWarehouseValidator.required("200", "XLX6", null)).thenReturn(
+            new FbaWarehouseValidator.VerifiedFbaWarehouse(200L, "XLX6", "FBA XLX6", "US", "CA"));
+        when(numbers.next(eq("RELABEL"), eq("10"), anyLong())).thenReturn("RL-SECOND");
+        when(lastlegOrders.selectById(99L)).thenReturn(tail);
+        when(cartons.findAvailable("customer-1", "10")).thenReturn(List.of(carton));
+        when(cartonItems.listCarton(101L)).thenReturn(List.of(returnCartonItem("SKU-A", 100)));
+        when(cartons.relabelledQuantity(101L, "SKU-A")).thenReturn(100L);
+        var error = assertThrows(ResponseStatusException.class, () -> service.createRelabel(
+            "customer-1", "merchant-1", "RT-MULTI", new ReturnOrderRequests.RelabelCreate(
+                List.of(new ReturnOrderRequests.RelabelItem("SKU-A", 1)),
+                "SKU_TOTAL", "200", "XLX6", "second-key", "second attempt")));
+        assertEquals(409, error.getStatusCode().value());
+        assertTrue(error.getReason().contains("可用实收数量不足"));
+        verify(relabelItems, never()).insert(any(RelabelItem.class));
+        verify(cartons, never()).updateById(any(ReturnInventoryCarton.class));
+    }
+
+    @Test
+    void relabelReplayRejectsKeyFromAnotherReturnOrder() {
+        ReturnOrder order = order("RT-MULTI", "10", "COMPLETED", 100, 100);
+        when(orders.lockCustomerNo("customer-1", "RT-MULTI")).thenReturn(order);
+        RelabelApplication old = new RelabelApplication(); old.setCustomerOrderNo("RT-OTHER");
+        when(relabelApplications.findKey("customer-1", "used-key")).thenReturn(old);
+        var error = assertThrows(ResponseStatusException.class, () -> service.createRelabel(
+            "customer-1", "merchant-1", "RT-MULTI", new ReturnOrderRequests.RelabelCreate(
+                List.of(new ReturnOrderRequests.RelabelItem("SKU-A", 1)),
+                "SKU_TOTAL", "200", "XLX6", "used-key", null)));
+        assertEquals(409, error.getStatusCode().value());
+        verifyNoInteractions(cartons, cartonItems, relabelItems, fbaWarehouseValidator);
+    }
+
     private static ReturnInventoryCartonItem returnCartonItem(String sku, long quantity) {
         ReturnInventoryCartonItem line = new ReturnInventoryCartonItem();
         line.setSkuCode(sku); line.setQuantity(quantity); return line;
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/service/LastlegOrderServiceTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/service/LastlegOrderServiceTest.java
index 3ff5b751c..4e8b1963c 100644
--- a/lastleg-service/src/test/java/com/baiyue/lastleg/service/LastlegOrderServiceTest.java
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/service/LastlegOrderServiceTest.java
@@ -95,7 +95,7 @@ class LastlegOrderServiceTest {
 
         LastlegOrderSummary summary = ReflectionTestUtils.invokeMethod(
             service, "summary", order, List.of(), null, "UNSCHEDULED",
-            new LastlegOrderMapper.OrderWeightRow(11L, new java.math.BigDecimal("30"), new java.math.BigDecimal("22")));
+            new LastlegOrderMapper.OrderWeightRow(11L, new java.math.BigDecimal("30"), new java.math.BigDecimal("22")), List.of());
 
         assertNotNull(summary);
         assertEquals("BOOKING-1", summary.sourceContainerBookingId());
diff --git a/scripts/README.md b/scripts/README.md
index 2b88625e8..ad44819c0 100644
--- a/scripts/README.md
+++ b/scripts/README.md
@@ -1,10 +1,20 @@
 # 后端脚本管理与全量 HTTP 验收索引
 
+`db/local-return-relabel-multiple-applications.sql`：本地 `baiyue_lastleg.ll_relabel_application` 单次结构修复，将尾程订单关联的唯一索引替换为普通索引，允许同一退货单剩余货物分批换标；不修改业务行，单号与幂等键唯一索引保留。凭据及目标连接由操作者显式提供，只在已授权本地库执行；DDL失败停止，已执行后不要重复运行，回查SHOW INDEX。新库结构同步在Lastleg基线和海外区域SQL中。
+
+`local-return-relabel-acceptance.mjs` 的 `LOCAL_RETURN_VERIFY_REMAINING=true` 专项新建3件退货，先换1件并客户确认，再对同一退货单剩余2件中的1件新建第二申请，验证同键重放、第二轮完工后剩余1件；不执行出库，报告 scope 为 `REMAINING_RETURN_RELABEL`，不代表出库验收通过。仍保留单据、使用正式API和合成照片，默认单票模式不变。
+
+`local-return-relabel-outbound.mjs`：仅本机网关，读取显式 `LOCAL_RETURN_SOURCE` 单票报告，为其中同客户、同仓、已完成换标的唯一一件可用库存执行平台创建出库、原键重放、PDA拣货及完成。沿用平台账号环境参数，报告默认 `reports/local-return-relabel-outbound-<marker>.json` 或 `--output`；创建临时PDA并finally停用，不改客户权限。平台库存核验不替代源报告的客户读权限失败。会推进库存与出库状态，保留单据及报告；失败后按已保存单号核查，不自动清理，不可对已出库库存盲目重跑。
+
+`db/local-dev-iam-number-sequence.sql`：经明确授权在 local/dev 的 `baiyue_iam` 补齐客户编号序列表，与 IAM 表结构基线一致；连接凭据由外部传入，无固定主机。创建表并初始化 `CUSTOMER_CODE`，事务锁定序列后按已有五位数字客户编码确定下限，已有较大序列不回退，不更新客户业务行。执行后输出表结构及序列，重复执行安全；失败停止，不清库，不用于区域空库初始化或生产迁移。
+
+`local-return-relabel-acceptance.mjs`：仅本机网关的单票退货换标独立编排器。显式传入 `ADMIN_TEST_GATEWAY`、`ADMIN_OVERSEAS_GATEWAY`、平台账号密码、`OVERSEAS_TEST_CUSTOMER_ID` 和 `INTERNAL_SERVICE_TOKEN`，可指定 `OVERSEAS_TEST_WAREHOUSE_ID`；先核对本地服务数据库连接。复用已有启用客户，经正式代登录接口，新建唯一SKU和一件退货，审核、PDA签收、Print生成验收PDF、转换标、组托、合成照片完工、客户确认及实际换标库存出库。复用内部模块的步骤函数，不借用历史业务库存，不运行客户建档或全量边界。会创建并最终停用临时PDA，业务记录保留；报告由 `--output` 指定，默认 `reports/local-return-relabel-single-<marker>.json`，阶段检查点保存单号，失败停止且重跑前必须核对报告，不自动清理或自动续跑，不代表现场作业或页面验收。
+
 `db/test-return-relabel-checks.sql`：测试库退货转换标检查约束定向修复，显式目标 `baiyue_lastleg.ll_return_inventory_carton`。与 Lastleg 基线保持一致，允许正数量的 `RELABEL_PENDING`，保留可用/已出库正数量与已合箱零数量限制。一条原子 ALTER 同时替换两个既有 CHECK，不修改业务行、不删除数据、不关闭约束；重复执行得到相同约束，旧约束不存在则报错停止。凭据由外部测试数据库连接提供，执行前需测试库操作授权；末尾只读输出约束定义供回查。不是生产迁移入口，不能替代完整 HTTP 换标回归。
 
 `../deploy/scripts/deploy-blue-green-service.sh`：受控部署流程调用的单服务蓝绿发布与健康检查入口；只由部署/Jenkins 编排使用，不作为普通验收脚本直接运行。目标服务、环境、镜像和凭据均由外部参数提供，失败按部署脚本回滚规则处理。
 
-`db/relabel-wait-status-incremental.sql`：存量换标主单状态修正，显式使用 `baiyue_lastleg`。由操作者选择已授权数据库连接执行，无内置凭据；只更新未生成入库单、仍为待分配的 `RELABEL_APPLICATION` 主单为待换标/待排车/待出库，不修改库存或删除单据。事务执行、可重复运行，执行后按换标号回查订单状态；无单独报告文件。
+`db/relabel-wait-status-incremental.sql`：存量换标主单状态修正，显式使用 `baiyue_lastleg`。由操作者选择已授权数据库连接执行，无内置凭据；修正未生成入库单、仍为待分配的 `RELABEL_APPLICATION` 主单，并将已客户确认且换标完成、仍停在待换标/待分配的仓储转运单按目的仓恢复为待排车或待确认目的仓，同步尾程主单和换标履约状态；不修改库存或删除单据。事务执行、可重复运行，执行后按换标号回查订单状态；无单独报告文件。
 
 `db/warehouse-transfer-outbound-incremental.sql`：固定指向 `baiyue_lastleg`，一次补齐仓储转运审核、提货、PDA 测量打托、现场照片、换标、FBA/私人仓目的地、入库计划、智能排车和派送所需表、租户字段及索引，并将换标新 SKU 和转运托盘生命周期字段修正为本地要求的可空结构。无内置凭据；表使用 `CREATE TABLE IF NOT EXISTS`，字段和索引通过 `information_schema` 独立判断，可重复执行，不删除或改写业务单据。完整成功时返回 `WAREHOUSE_TRANSFER_LATEST_SCHEMA_READY`；若历史数据存在同客户重复托盘号，则返回 `WAREHOUSE_TRANSFER_SCHEMA_APPLIED_WITH_INDEX_BLOCKER`，且 `inbound_pallet_unique_index` 为 `BLOCKED_BY_DUPLICATE_CUSTOMER_PALLET_NO`。其余结构仍正常补齐，脚本不会擅自修改历史托盘号。
 
diff --git a/scripts/admin-test-env-acceptance.mjs b/scripts/admin-test-env-acceptance.mjs
index de2e51619..df080bd58 100644
--- a/scripts/admin-test-env-acceptance.mjs
+++ b/scripts/admin-test-env-acceptance.mjs
@@ -375,6 +375,7 @@ export function parseArguments(argv) {
     verifyPalletLocationGuide: values.has('verify-pallet-location-guide'),
     routeMode: values.get('route-mode') || 'fixed',
     quiet: values.get('quiet') === 'true',
+    returnMainChainOnly: values.get('return-main-chain-only') === 'true',
     manualSplitFixtureReport: values.get('manual-split-fixture-report') || '',
     manualSplitPlanId: values.get('manual-split-plan-id') || '',
     manualPreloadSourceReport: values.get('manual-preload-source-report') || '',
diff --git a/scripts/admin-test-env-modules/README.md b/scripts/admin-test-env-modules/README.md
index 113741e2d..2e157969d 100644
--- a/scripts/admin-test-env-modules/README.md
+++ b/scripts/admin-test-env-modules/README.md
@@ -4,6 +4,8 @@
 
 总入口是 `../admin-test-env-acceptance.mjs`。每个业务模块使用独立的同名 `.mjs` 文件，避免多个对话同时修改总入口。
 
+单票串行验收可显式传 `--modules phase4-overseas-return-followups --return-main-chain-only true`：仍由总入口准备本轮客户并完成退货签收、合箱、换标和出库；不执行第二客户、跨仓和并发扩展，报告 `excludedScope` 记录排除范围，不代表完整退货边界回归。目标由显式网关与账号参数指定；仅在已授权环境执行，保留业务单据及 `--output` 报告，失败先核对报告再重跑，不自动清理。
+
 普通库存换标回归由 `phase4-overseas-pda-operations` 验证：正常箱先完成混合换标的箱标与 SKU 阶段，另两箱保留跳过/异常；首次显式异常完工后经平台 `/rework` 退回并验证幂等，返工重新完成全部箱标/SKU 事实，再生成本轮目标托盘、绑定及核对库存流水，最后正常完工和客户确认。PDA 不自行批准复核，不在客户确认后才首次组托；异常首次完工会创建关联异常记录，属于测试数据副作用，保留为验收证据。
 
 尾程暂扣按真实入库阶段验收：`phase4-tail-order-controls` 在 PDA 入库前验证暂扣返回冲突并回查订单零漂移，继续人工节点及整柜计划转换；`phase4-overseas-pda-operations` 接收本轮完成库存后调用同模块的 `verifyReceivedOrderHold`，重新核对本轮客户、订单和 `INBOUND_COMPLETED` 状态，再执行暂扣、同键重放/异参冲突、解除。正向暂扣未执行或前置不足仍是失败，不以入库前拒绝代替正向通过。
diff --git a/scripts/admin-test-env-modules/phase4-overseas-return-receipt.mjs b/scripts/admin-test-env-modules/phase4-overseas-return-receipt.mjs
index 5ff371f88..4507940a6 100644
--- a/scripts/admin-test-env-modules/phase4-overseas-return-receipt.mjs
+++ b/scripts/admin-test-env-modules/phase4-overseas-return-receipt.mjs
@@ -479,7 +479,11 @@ export async function run(context) {
         trace(merchantSummary.response), OPTIONS)
     }
 
-    await runReturnBoundaries(context, { merchantToken, warehouse, picker, access })
+    if (context.options.returnMainChainOnly) {
+      context.createdResources.phase4OverseasReturnReceipt.excludedScope = 'Additional customer, cross-warehouse and concurrent return boundary scenarios';
+    } else {
+      await runReturnBoundaries(context, { merchantToken, warehouse, picker, access })
+    }
   } finally {
     await disablePicker(context, picker, 91)
   }
diff --git a/scripts/db/local-dev-iam-number-sequence.sql b/scripts/db/local-dev-iam-number-sequence.sql
new file mode 100644
index 000000000..191700179
--- /dev/null
+++ b/scripts/db/local-dev-iam-number-sequence.sql
@@ -0,0 +1,21 @@
+-- Target only an explicitly authorized local/dev connection and baiyue_iam.
+-- Preserve existing customer rows and never reset an existing sequence backwards.
+USE baiyue_iam;
+CREATE TABLE IF NOT EXISTS iam_number_sequence (
+  sequence_key VARCHAR(64) NOT NULL COMMENT '业务编号类型',
+  next_value BIGINT UNSIGNED NOT NULL COMMENT '下一待分配数字',
+  updated_at DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3) ON UPDATE CURRENT_TIMESTAMP(3) COMMENT '更新时间',
+  PRIMARY KEY (sequence_key)
+) ENGINE=InnoDB COMMENT='IAM业务编号序列表';
+START TRANSACTION;
+INSERT IGNORE INTO iam_number_sequence(sequence_key, next_value) VALUES ('CUSTOMER_CODE', 1);
+SELECT next_value FROM iam_number_sequence WHERE sequence_key='CUSTOMER_CODE' FOR UPDATE;
+SET @customer_code_floor = (
+  SELECT COALESCE(MAX(CAST(tenant_code AS UNSIGNED)), 0) + 1
+  FROM iam_tenant WHERE tenant_code REGEXP '^[0-9]{5}$'
+);
+UPDATE iam_number_sequence SET next_value=GREATEST(next_value,@customer_code_floor)
+WHERE sequence_key='CUSTOMER_CODE';
+COMMIT;
+SHOW CREATE TABLE iam_number_sequence;
+SELECT sequence_key,next_value FROM iam_number_sequence;
diff --git a/scripts/db/local-return-relabel-multiple-applications.sql b/scripts/db/local-return-relabel-multiple-applications.sql
new file mode 100644
index 000000000..9f8d735f4
--- /dev/null
+++ b/scripts/db/local-return-relabel-multiple-applications.sql
@@ -0,0 +1,19 @@
+-- Local baiyue_lastleg only; retain every application and all idempotency constraints.
+USE baiyue_lastleg;
+SET @relabel_has_unique = (SELECT COUNT(*) FROM information_schema.statistics
+  WHERE table_schema = DATABASE() AND table_name = 'll_relabel_application'
+    AND index_name = 'uk_ll_relabel_application_order');
+SET @relabel_has_index = (SELECT COUNT(*) FROM information_schema.statistics
+  WHERE table_schema = DATABASE() AND table_name = 'll_relabel_application'
+    AND index_name = 'idx_ll_relabel_application_order');
+SET @relabel_index_sql = CASE
+  WHEN @relabel_has_unique > 0 AND @relabel_has_index = 0 THEN
+    'ALTER TABLE ll_relabel_application DROP INDEX uk_ll_relabel_application_order, ADD INDEX idx_ll_relabel_application_order (lastleg_order_id)'
+  WHEN @relabel_has_unique > 0 THEN
+    'ALTER TABLE ll_relabel_application DROP INDEX uk_ll_relabel_application_order'
+  WHEN @relabel_has_index = 0 THEN
+    'ALTER TABLE ll_relabel_application ADD INDEX idx_ll_relabel_application_order (lastleg_order_id)'
+  ELSE 'SELECT 1' END;
+PREPARE relabel_index_migration FROM @relabel_index_sql;
+EXECUTE relabel_index_migration;
+DEALLOCATE PREPARE relabel_index_migration;
diff --git a/scripts/db/relabel-wait-status-incremental.sql b/scripts/db/relabel-wait-status-incremental.sql
index d14947c6e..72b0c412c 100644
--- a/scripts/db/relabel-wait-status-incremental.sql
+++ b/scripts/db/relabel-wait-status-incremental.sql
@@ -13,4 +13,41 @@ WHERE o.order_type='RELABEL_APPLICATION' AND o.current_status='PENDING_ASSIGNMEN
   AND o.inbound_order_no IS NULL
   AND (a.status IN ('PENDING_PROCESSING','PROCESSING','CUSTOMER_CONFIRM_PENDING')
        OR (a.status='READY_FOR_OUTBOUND' AND a.fulfillment_status IN ('WAIT_PRE_DISPATCH','WAIT_OUTBOUND_CREATION','OUTBOUND_CREATED')));
+
+-- 仓储转运已完成入库和换标后不得回到“待分配”；按是否已有目的仓恢复后续状态。
+UPDATE ll_warehouse_transfer_order t
+JOIN ll_relabel_application a ON a.id=t.relabel_application_id
+  AND a.customer_id=t.customer_id AND a.relabel_no=t.relabel_no
+SET t.status=CASE
+      WHEN COALESCE(t.fba_warehouse_code,'')<>'' THEN 'READY_FOR_DISPATCH'
+      ELSE 'WAIT_FBA_DESTINATION' END,
+    t.relabel_completed_at=COALESCE(t.relabel_completed_at,a.customer_confirmed_at),
+    t.updated_at=CURRENT_TIMESTAMP(3)
+WHERE t.status='WAIT_RELABEL'
+  AND a.customer_confirmed_at IS NOT NULL
+  AND a.status IN ('READY_FOR_OUTBOUND','COMPLETED');
+
+UPDATE ll_order o
+JOIN ll_warehouse_transfer_order t ON t.lastleg_order_id=o.id AND t.customer_id=o.customer_id
+JOIN ll_relabel_application a ON a.id=t.relabel_application_id AND a.customer_id=t.customer_id
+SET o.current_status=t.status,
+    o.relabel_status='COMPLETED',
+    o.sub_order_status=CONCAT('WAREHOUSE_TRANSFER:',t.status,';RELABEL:COMPLETED'),
+    o.updated_at=CURRENT_TIMESTAMP(3)
+WHERE o.order_type='WAREHOUSE_TRANSFER'
+  AND o.current_status IN ('PENDING_ASSIGNMENT','WAIT_OUTBOUND','INBOUND_COMPLETED')
+  AND t.status IN ('READY_FOR_DISPATCH','WAIT_FBA_DESTINATION')
+  AND a.customer_confirmed_at IS NOT NULL
+  AND a.status IN ('READY_FOR_OUTBOUND','COMPLETED');
+
+UPDATE ll_relabel_application a
+JOIN ll_warehouse_transfer_order t ON t.relabel_application_id=a.id AND t.customer_id=a.customer_id
+SET a.fulfillment_status=CASE
+      WHEN t.status='READY_FOR_DISPATCH' THEN 'WAIT_PRE_DISPATCH'
+      ELSE 'WAIT_FBA_DESTINATION' END,
+    a.updated_at=CURRENT_TIMESTAMP(3)
+WHERE a.customer_confirmed_at IS NOT NULL
+  AND a.status IN ('READY_FOR_OUTBOUND','COMPLETED')
+  AND t.status IN ('READY_FOR_DISPATCH','WAIT_FBA_DESTINATION')
+  AND a.fulfillment_status IN ('WAIT_RELABEL','WAIT_OUTBOUND_CREATION','WAIT_PRE_DISPATCH','READY_FOR_DISPATCH','WAIT_FBA_DESTINATION');
 COMMIT;
diff --git a/scripts/local-return-relabel-acceptance.mjs b/scripts/local-return-relabel-acceptance.mjs
new file mode 100644
index 000000000..0621da00e
--- /dev/null
+++ b/scripts/local-return-relabel-acceptance.mjs
@@ -0,0 +1,145 @@
+import { mkdir, writeFile } from 'node:fs/promises'
+import { dirname, resolve } from 'node:path'
+import { createHash } from 'node:crypto'
+import { AcceptanceRun, parseArguments, buildAcceptanceSummary } from './admin-test-env-acceptance.mjs'
+import { resolvePickerAccess, createPicker, disablePicker } from './admin-test-env-modules/phase4-overseas-pda.mjs'
+import { approveReturnFixture } from './admin-test-env-modules/phase4-overseas-return-receipt.mjs'
+import { completeReturnRelabel, outboundRelabelledReturn } from './admin-test-env-modules/phase4-overseas-return-followups.mjs'
+
+const options = parseArguments(process.argv.slice(2))
+for (const url of [options.gateway, options.overseasGateway]) {
+  if (!['127.0.0.1', 'localhost'].includes(new URL(url).hostname)) throw new Error('Local gateways required')
+}
+const customerId = process.env.OVERSEAS_TEST_CUSTOMER_ID
+if (!customerId || !options.username || !options.password || !process.env.INTERNAL_SERVICE_TOKEN) throw new Error('Explicit customer, credentials and internal token required')
+const context = new AcceptanceRun(options)
+const verifyRemaining = process.env.LOCAL_RETURN_VERIFY_REMAINING === 'true'
+const receiptQuantity = verifyRemaining ? 3 : 1
+const output = resolve(options.output || `reports/local-return-relabel-single-${context.marker}.json`)
+const moduleName = 'local-return-relabel-single'
+let picker
+let fatal = null
+const facts = { marker: context.marker, customerId, scope: verifyRemaining ? 'REMAINING_RETURN_RELABEL' : 'ONE_NEW_RETURN_SKU_ON_EXISTING_LOCAL_CUSTOMER', photoEvidence: 'SYNTHETIC_TEST_IMAGE' }
+context.context.merchantQualificationFixture = { marker: context.marker, tenantId: customerId }
+context.createdResources.phase4OverseasReturnReceipt = facts
+const success = response => response.http === 200 && String(response.body?.code) === '200'
+async function save() {
+  await mkdir(dirname(output), { recursive: true })
+  const summary = buildAcceptanceSummary(context.steps, [], [])
+  await writeFile(output, JSON.stringify({ success: !fatal && (verifyRemaining ? facts.remainingRelabelPassed === true : facts.relabelOutboundNo != null) && summary.failed === 0, fatal, summary, facts, steps: context.steps }, null, 2))
+}
+function check(name, condition) {
+  context.assert(moduleName, name, null, Boolean(condition), '', { deploymentBlocker: true })
+  if (!condition) throw new Error(name)
+}
+async function command(region, token, method, path, body, headers = {}) {
+  const response = region === 'cn' ? await context.request(method, path, body, token)
+    : await context.requestOverseas(method, path, body, headers, token)
+  context.addStep(moduleName, `${method} ${path}`, response, success(response), '', { deploymentBlocker: true })
+  if (!success(response)) throw new Error(`${method} ${path}: ${response.body?.code} ${response.body?.message}; requestId=${response.requestId}; traceId=${response.traceId}`)
+  return response.body.data
+}
+async function upload(token, path, bytes, name, type) {
+  const form = new FormData()
+  form.append('file', new Blob([bytes], { type }), name)
+  const response = await context.requestOverseasMultipart('POST', path, form, token)
+  context.addStep(moduleName, `Upload ${path}`, response, success(response), '', { deploymentBlocker: true })
+  if (!success(response)) throw new Error(`Upload failed: ${response.body?.code} ${response.body?.message}`)
+  return response.body.data
+}
+try {
+  const login = await command('cn', '', 'POST', '/api/auth/login', { loginId: options.username, password: options.password })
+  context.token = login.accessToken
+  context.overseasToken = login.overseasAccessToken
+  const ticket = await command('cn', context.token, 'POST', `/api/platform/v1/iam/tenants/${customerId}/impersonation`, { reason: `${context.marker} 本地单票退货换标验收` })
+  const merchant = await command('cn', '', 'POST', '/api/auth/impersonations/exchange', { code: ticket.code })
+  const token = merchant.overseasAccessToken
+  const permissions = await command('cn', merchant.accessToken, 'GET', '/api/merchant/v1/iam/authorization/permissions')
+  check('Merchant return create and relabel permissions', permissions.includes('merchant:overseas-warehouse:return-order:create') && permissions.includes('merchant:overseas-warehouse:return-order:relabel'))
+  await command('os', token, 'GET', '/api/merchant/v1/last-leg/return-orders?page=1&size=1')
+  const warehouses = await command('cn', context.token, 'GET', '/api/platform/v1/warehouse-admin?page=1&size=200&warehouseType=OVERSEAS&status=ACTIVE&capabilityCode=RECEIVING')
+  const warehouse = warehouses.records.find(row => row.id === process.env.OVERSEAS_TEST_WAREHOUSE_ID) || warehouses.records[0]
+  check('Existing active overseas receiving warehouse', warehouse?.id)
+  const warehouseId = String(warehouse.id)
+  facts.warehouseId = warehouseId
+  let destination
+  for (let page = 1; page <= 20; page++) {
+    const data = await command('cn', context.token, 'GET', `/api/platform/v1/warehouse-admin?page=${page}&size=200&warehouseType=FBA&status=ACTIVE`)
+    destination = data.records.find(row => row.warehouseCode === 'SCK8')
+    if (destination || page * 200 >= Number(data.total)) break
+  }
+  check('Existing active SCK8 destination', destination?.id)
+  const access = await resolvePickerAccess(context)
+  check('PDA role available', access)
+  picker = await createPicker(context, 93, warehouseId, access)
+  check('PDA session ready', picker?.token)
+  const skuCode = `LOCAL-RETURN-${Date.now()}`
+  facts.skuCode = skuCode
+  const root = '/api/merchant/v1/last-leg/return-orders'
+  const receipts = '/api/pda/v1/last-leg/return-receipts'
+  const created = await command('os', token, 'POST', root, { overseasWarehouseId: warehouseId, warehouseContactName: '本地验收', warehouseContactPhone: '0000000000', customerReferenceNo: context.marker, needRelabel: false, remark: context.marker, idempotencyKey: `${context.marker}-CREATE`, items: [{ skuCode, productNameZh: '本地退货换标验收商品', expectedQuantity: receiptQuantity }] })
+  const returnNo = created.order.returnNo
+  facts.returnNo = returnNo
+  await save()
+  await approveReturnFixture(context, token, created)
+  await command('os', picker.token, 'POST', `${receipts}/start`, { returnNo })
+  const pallet = await command('os', picker.token, 'POST', `${receipts}/pallets`, { returnNo, skuCode })
+  const png = Buffer.from('iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mP8/x8AAwMCAO+aWQAAAABJRU5ErkJggg==', 'base64')
+  await upload(picker.token, `${receipts}/${returnNo}/photos/files`, png, 'synthetic-receipt.png', 'image/png')
+  const receiptBody = { returnNo, startedBy: 'RETURN_NO', palletCode: pallet.palletCode, items: [{ skuCode, receivedQuantity: receiptQuantity }], idempotencyKey: `${context.marker}-RECEIPT` }
+  const received = await command('os', picker.token, 'POST', `${receipts}/confirm`, receiptBody)
+  const replay = await command('os', picker.token, 'POST', `${receipts}/confirm`, receiptBody)
+  check('Receipt completed once with one stock and fee batch', received.orderStatus === 'COMPLETED' && Number(received.receivedQuantity) === receiptQuantity && received.receiptNo === replay.receiptNo && received.receiptBatchNo === replay.receiptBatchNo)
+  facts.receiptNo = received.receiptNo
+  facts.receiptBatchNo = received.receiptBatchNo
+  facts.sourcePalletCode = pallet.palletCode
+  await save()
+  const relabel = await command('os', token, 'POST', `${root}/${returnNo}/relabel`, { items: [{ skuCode, quantity: 1 }], fileScope: 'CARTON_TOTAL', destinationFbaWarehouseId: String(destination.id), destinationFbaWarehouseCode: destination.warehouseCode, cartonRemark: context.marker, idempotencyKey: `${context.marker}-RELABEL` })
+  const relabelNo = relabel.relabelNo
+  check('Relabel references the new return', relabel.returnNo === returnNo && relabel.status === 'PENDING_REVIEW' && relabelNo)
+  facts.relabelNo = relabelNo
+  await save()
+  const rendered = await fetch('http://127.0.0.1:9207/internal/print/v1/pdfs/inbound-marks', { method: 'POST', headers: { 'X-Internal-Service-Token': process.env.INTERNAL_SERVICE_TOKEN, 'X-Operator-Id': '1', 'Content-Type': 'application/json' }, body: JSON.stringify({ templateCode: 'INBOUND_MARK_V1', pageSpec: { widthMm: 100, heightMm: 100 }, downloadFileName: 'local-return-relabel.pdf', labels: [{ topCode: skuCode, warehouseText: destination.warehouseCode, cartonText: 'QTY: 1', routeText: 'LOCAL ACCEPTANCE', qrContent: relabelNo }] }) })
+  const pdf = Buffer.from(await rendered.arrayBuffer())
+  check('Print service returned real PDF', rendered.ok && pdf.subarray(0, 5).toString() === '%PDF-')
+  facts.labelPdfSha256 = createHash('sha256').update(pdf).digest('hex')
+  const uploaded = await upload(token, `/api/merchant/v1/last-leg/relabel-applications/${relabelNo}/files?scope=CARTON_TOTAL`, pdf, 'local-return-relabel.pdf', 'application/pdf')
+  facts.labelFileId = uploaded.fileId
+  await completeReturnRelabel(context, token, picker.token, relabelNo, returnNo)
+  await save()
+  if (verifyRemaining) {
+    const candidates = await command('os', token, 'GET', `${root}/${returnNo}/relabel-candidates`)
+    check('Two unlabelled pieces remain on the source pallet', candidates.filter(row => row.cartonMark === pallet.palletCode).flatMap(row => row.items).reduce((sum, row) => sum + Number(row.receivedQuantity), 0) === 2)
+    const body = { items: [{ skuCode, quantity: 1 }], fileScope: 'CARTON_TOTAL', destinationFbaWarehouseId: String(destination.id), destinationFbaWarehouseCode: destination.warehouseCode, cartonRemark: `${context.marker}-SECOND`, idempotencyKey: `${context.marker}-RELABEL-SECOND` }
+    const second = await command('os', token, 'POST', `${root}/${returnNo}/relabel`, body)
+    check('Second application accepts remaining goods on same return', second.returnNo === returnNo && second.relabelNo !== relabelNo && second.status === 'PENDING_REVIEW')
+    facts.secondRelabelNo = second.relabelNo
+    await save()
+    const repeated = await command('os', token, 'POST', `${root}/${returnNo}/relabel`, body)
+    check('Second application replay does not duplicate allocation', repeated.relabelNo === second.relabelNo)
+    await upload(token, `/api/merchant/v1/last-leg/relabel-applications/${second.relabelNo}/files?scope=CARTON_TOTAL`, pdf, 'local-return-second.pdf', 'application/pdf')
+    context.marker = `${facts.marker}-SECOND`
+    try {
+      await completeReturnRelabel(context, token, picker.token, second.relabelNo, returnNo)
+    } finally {
+      context.marker = facts.marker
+    }
+    const after = await command('os', token, 'GET', `${root}/${returnNo}/relabel-candidates`)
+    check('Exactly one unlabelled piece remains after two completed batches', after.filter(row => row.cartonMark === pallet.palletCode).flatMap(row => row.items).reduce((sum, row) => sum + Number(row.receivedQuantity), 0) === 1)
+    facts.remainingRelabelPassed = true
+  } else {
+    await outboundRelabelledReturn(context, token, picker.token, relabelNo, returnNo, warehouseId)
+  }
+  const final = (await command('os', token, 'GET', `${root}/${returnNo}`)).order
+  facts.finalReturnStatus = final.status
+  facts.finalRelabelStatus = final.relabelStatus
+} catch (error) {
+  fatal = error.message
+  process.exitCode = 1
+} finally {
+  if (picker?.membershipId) {
+    try { await disablePicker(context, picker, 93) } catch (error) { fatal = `${fatal || ''} cleanup: ${error.message}`; process.exitCode = 1 }
+  }
+  await save()
+  console.log(JSON.stringify({ output, fatal, facts, summary: buildAcceptanceSummary(context.steps, [], []), failures: context.steps.filter(step => !step.passed) }, null, 2))
+}
diff --git a/scripts/local-return-relabel-outbound.mjs b/scripts/local-return-relabel-outbound.mjs
new file mode 100644
index 000000000..f0abe3c74
--- /dev/null
+++ b/scripts/local-return-relabel-outbound.mjs
@@ -0,0 +1,72 @@
+import { readFile, writeFile, mkdir } from 'node:fs/promises'
+import { dirname } from 'node:path'
+import { AcceptanceRun, parseArguments, buildAcceptanceSummary } from './admin-test-env-acceptance.mjs'
+import { resolvePickerAccess, createPicker, disablePicker } from './admin-test-env-modules/phase4-overseas-pda.mjs'
+
+const options = parseArguments(process.argv.slice(2))
+for (const url of [options.gateway, options.overseasGateway]) {
+  if (!['127.0.0.1', 'localhost'].includes(new URL(url).hostname)) throw new Error('Local only')
+}
+if (!process.env.LOCAL_RETURN_SOURCE) throw new Error('LOCAL_RETURN_SOURCE required')
+const previous = JSON.parse(await readFile(process.env.LOCAL_RETURN_SOURCE, 'utf8'))
+const f = previous.facts
+if (!f.relabelCompleted || !f.returnNo || !f.relabelNo || !f.customerId || !f.warehouseId) throw new Error('Completed relabel evidence required')
+const c = new AcceptanceRun(options)
+const output = options.output || `reports/local-return-relabel-outbound-${c.marker}.json`
+let picker, error = null
+const report = { source: process.env.LOCAL_RETURN_SOURCE, facts: f, scope: 'PLATFORM_VERIFIED_OUTBOUND_ONLY', merchantInventoryRead: 'NOT_VERIFIED_SEE_SOURCE_REPORT' }
+function check(name, ok) {
+  c.assert('local-outbound', name, null, Boolean(ok), '', { deploymentBlocker: true })
+  if (!ok) throw new Error(name)
+}
+async function api(region, token, method, path, body) {
+  const r = region === 'cn' ? await c.request(method, path, body, token) : await c.requestOverseas(method, path, body, {}, token)
+  const ok = r.http === 200 && String(r.body?.code) === '200'
+  c.addStep('local-outbound', `${method} ${path}`, r, ok, '', { deploymentBlocker: true })
+  if (!ok) throw new Error(`${path}: ${r.body?.code} ${r.body?.message}`)
+  return r.body.data
+}
+async function save() {
+  await mkdir(dirname(output), { recursive: true })
+  await writeFile(output, JSON.stringify({ ...report, error, summary: buildAcceptanceSummary(c.steps, [], []), steps: c.steps }, null, 2))
+}
+try {
+  const l = await api('cn', '', 'POST', '/api/auth/login', { loginId: options.username, password: options.password })
+  c.token = l.accessToken; c.overseasToken = l.overseasAccessToken
+  const inv = '/api/platform/v1/last-leg/return-inventory/cartons'
+  const root = '/api/platform/v1/last-leg/outbound-orders'
+  const candidates = await api('os', c.overseasToken, 'GET', `${root}/return/candidates?customerId=${f.customerId}&warehouseId=${f.warehouseId}`)
+  const matches = []
+  for (const row of candidates.filter(x => x.returnNo === f.returnNo)) {
+    const d = await api('os', c.overseasToken, 'GET', `${inv}/${encodeURIComponent(row.cartonMark)}`)
+    if (d.relabelNo === f.relabelNo) matches.push(d)
+  }
+  check('Exactly one matching relabelled return carton', matches.length === 1)
+  const d = matches[0]
+  check('Customer warehouse quantity and completed relabel match', d.customerId === f.customerId && d.overseasWarehouseId === f.warehouseId && d.sourceReturnNo === f.returnNo && d.status === 'AVAILABLE' && d.relabelStatus === 'COMPLETED' && Number(d.totalQuantity) === 1)
+  const access = await resolvePickerAccess(c)
+  check('PDA role', access)
+  picker = await createPicker(c, 94, f.warehouseId, access)
+  check('PDA ready', picker?.token)
+  const body = { recipient: 'LOCAL ACCEPTANCE', overseasWarehouseId: f.warehouseId, returnNo: f.returnNo, cartonMarks: [d.cartonMark], remark: f.marker, idempotencyKey: `${f.marker}-OUTBOUND` }
+  const task = await api('os', c.overseasToken, 'POST', `${root}/return?customerId=${f.customerId}`, body)
+  report.outboundNo = task.outboundNo; report.taskNo = task.taskNo
+  await save()
+  const replay = await api('os', c.overseasToken, 'POST', `${root}/return?customerId=${f.customerId}`, body)
+  check('Outbound idempotent', replay.outboundNo === task.outboundNo && replay.taskNo === task.taskNo)
+  const path = `/api/pda/v1/last-leg/outbound-tasks/${encodeURIComponent(task.taskNo)}`
+  const detail = await api('os', picker.token, 'GET', path)
+  const frozen = await api('os', c.overseasToken, 'GET', `${root}/${task.outboundNo}?customerId=${f.customerId}`)
+  check('Frozen outbound contains only matching carton', detail.items.length === 1 && Number(detail.items[0].packageCount) === 1 && frozen.pallets.length === 1 && frozen.pallets[0].cartonMarks === d.cartonMark && String(frozen.pallets[0].id) === String(detail.items[0].outboundPalletItemId))
+  await api('os', picker.token, 'POST', `${path}/pick`, { outboundPalletItemId: detail.items[0].outboundPalletItemId, inventoryPositionId: null, packages: 1, cartonMarks: [d.cartonMark], idempotencyKey: `${f.marker}-PICK` })
+  const done = await api('os', picker.token, 'POST', `${path}/complete`, { idempotencyKey: `${f.marker}-OUTBOUND-COMPLETE` })
+  const final = await api('os', c.overseasToken, 'GET', `${root}/${task.outboundNo}?customerId=${f.customerId}`)
+  const stock = await api('os', c.overseasToken, 'GET', `${inv}/${encodeURIComponent(d.cartonMark)}`)
+  check('Outbound completed and stock OUTBOUNDED', done.status === 'COMPLETED' && final.outbound.status === 'OUTBOUNDED' && stock.status === 'OUTBOUNDED' && stock.relabelNo === f.relabelNo && stock.sourceReturnNo === f.returnNo && Number(stock.totalQuantity) === 1)
+  report.finalOutboundStatus = final.outbound.status; report.finalInventoryStatus = stock.status; report.fulfillmentPassed = true
+} catch (e) { error = e.message; process.exitCode = 1 }
+finally {
+  if (picker?.membershipId) { try { await disablePicker(c, picker, 94) } catch (e) { error = `${error || ''} cleanup: ${e.message}`; process.exitCode = 1 } }
+  await save()
+  console.log(JSON.stringify({ output, error, outboundNo: report.outboundNo, finalOutboundStatus: report.finalOutboundStatus, finalInventoryStatus: report.finalInventoryStatus, summary: buildAcceptanceSummary(c.steps, [], []), failures: c.steps.filter(x => !x.passed) }, null, 2))
+}