diff --git a/src/modules/ocean-bookings/containerRequirements.test.ts b/src/modules/ocean-bookings/containerRequirements.test.ts
new file mode 100644
index 00000000..5cf0884d
--- /dev/null
+++ b/src/modules/ocean-bookings/containerRequirements.test.ts
@@ -0,0 +1,16 @@
+import { describe, expect, it } from 'vitest'
+import { containerRequirementError, createBlankContainerRequirement } from './containerRequirements'
+
+describe('ocean booking container requirements', () => {
+  it('does not guess capacity or weight for a new container type', () => {
+    expect(createBlankContainerRequirement()).toEqual({
+      containerType: '40HC', containerKind: 'FCL', capacityCbm: null, maxWeightKg: null, quantity: 1,
+    })
+  })
+
+  it('rejects missing or non-positive capacity, weight and quantity', () => {
+    expect(containerRequirementError([createBlankContainerRequirement()])).toContain('容量、限重和数量必须大于 0')
+    expect(containerRequirementError([{ containerType: 'UNKNOWN', containerKind: 'FCL', capacityCbm: 1, maxWeightKg: 1, quantity: 0 }])).toContain('UNKNOWN')
+    expect(containerRequirementError([{ containerType: 'UNKNOWN', containerKind: 'FCL', capacityCbm: 1, maxWeightKg: 1, quantity: 1 }])).toBeNull()
+  })
+})
diff --git a/src/modules/ocean-bookings/containerRequirements.ts b/src/modules/ocean-bookings/containerRequirements.ts
new file mode 100644
index 00000000..b6987887
--- /dev/null
+++ b/src/modules/ocean-bookings/containerRequirements.ts
@@ -0,0 +1,10 @@
+import type { OceanBookingContainer } from './types'
+
+export function createBlankContainerRequirement(): OceanBookingContainer {
+  return { containerType: '40HC', containerKind: 'FCL', capacityCbm: null, maxWeightKg: null, quantity: 1 }
+}
+
+export function containerRequirementError(requirements: OceanBookingContainer[]) {
+  const invalid = requirements.find((item) => !(Number(item.capacityCbm) > 0) || !(Number(item.maxWeightKg) > 0) || !(Number(item.quantity) > 0))
+  return invalid ? `箱型 ${invalid.containerType || '未命名'} 的容量、限重和数量必须大于 0，请补充后再提交` : null
+}
diff --git a/src/modules/ocean-bookings/pages/OceanBookingDetailView.test.ts b/src/modules/ocean-bookings/pages/OceanBookingDetailView.test.ts
index 15a97d10..0c5e63a2 100644
--- a/src/modules/ocean-bookings/pages/OceanBookingDetailView.test.ts
+++ b/src/modules/ocean-bookings/pages/OceanBookingDetailView.test.ts
@@ -48,10 +48,9 @@ describe('OceanBookingDetailView interaction contract', () => {
     expect(source).toContain('v-model="container.capacityCbm"')
     expect(source).toContain('v-model="container.maxWeightKg"')
     expect(source).toContain('releaseOceanBooking(id.value, releaseRequest)')
-    expect(source).toContain('capacityCbm: null')
-    expect(source).toContain('maxWeightKg: null')
+    expect(source).toContain('createBlankContainerRequirement()')
+    expect(source).toContain('containerRequirementError(form.data.containerRequirements)')
     expect(source).toContain('function validateContainerRequirements()')
-    expect(source).toContain('容量、限重和数量必须大于 0')
     expect(source).not.toContain('capacityCbm: 68')
     expect(source).not.toContain('maxWeightKg: 28000')
   })
diff --git a/src/modules/ocean-bookings/pages/OceanBookingDetailView.vue b/src/modules/ocean-bookings/pages/OceanBookingDetailView.vue
index 707630ba..e8d21baa 100644
--- a/src/modules/ocean-bookings/pages/OceanBookingDetailView.vue
+++ b/src/modules/ocean-bookings/pages/OceanBookingDetailView.vue
@@ -32,6 +32,7 @@ import type {
   OceanBookingStatus,
 } from '../types'
 import { oceanBookingStatusLabel } from '../status'
+import { containerRequirementError, createBlankContainerRequirement } from '../containerRequirements'
 
 const partyTypes = [
   { value: 'SHIPPER', label: '发货人' },
@@ -85,7 +86,7 @@ function blankParties(): OceanBookingParty[] {
 function blankData(): OceanBookingDraftData {
   return {
     customerId: '', customerName: '', channelCode: '', channelName: '', warehouseId: '', warehouseName: '', parties: blankParties(),
-    containerRequirements: [{ containerType: '40HC', containerKind: 'FCL', capacityCbm: null, maxWeightKg: null, quantity: 1 }],
+    containerRequirements: [createBlankContainerRequirement()],
   }
 }
 const form = reactive<OceanBookingSaveRequest>({ expectedVersion: 0, data: blankData() })
@@ -151,7 +152,7 @@ function applyDetail(value: OceanBookingDetail) {
     estimatedSailingAt: value.estimatedSailingAt, estimatedArrivalAt: value.estimatedArrivalAt,
     remark: value.remark,
     parties: value.parties.length ? value.parties.map(({ partyType, partyName, contactName, contactPhone, address }) => ({ partyType, partyName, contactName, contactPhone, address })) : blankParties(),
-    containerRequirements: value.containerRequirements.length ? value.containerRequirements.map(({ containerType, containerKind, capacityCbm, maxWeightKg, quantity }) => ({ containerType, containerKind, capacityCbm: capacityCbm ?? null, maxWeightKg: maxWeightKg ?? null, quantity: quantity ?? null })) : [{ containerType: '40HC', containerKind: 'FCL', capacityCbm: null, maxWeightKg: null, quantity: 1 }],
+    containerRequirements: value.containerRequirements.length ? value.containerRequirements.map(({ containerType, containerKind, capacityCbm, maxWeightKg, quantity }) => ({ containerType, containerKind, capacityCbm: capacityCbm ?? null, maxWeightKg: maxWeightKg ?? null, quantity: quantity ?? null })) : [createBlankContainerRequirement()],
   }
 }
 async function load() {
@@ -230,14 +231,14 @@ async function runAction(action: OceanBookingAction) {
   } finally { actionSaving.value = false }
 }
 function validateContainerRequirements() {
-  const invalid = form.data.containerRequirements.find((container) => !(Number(container.capacityCbm) > 0) || !(Number(container.maxWeightKg) > 0) || !(Number(container.quantity) > 0))
-  if (invalid) {
-    actionError.value = { message: `箱型 ${invalid.containerType || '未命名'} 的容量、限重和数量必须大于 0，请补充后再提交` }
+  const message = containerRequirementError(form.data.containerRequirements)
+  if (message) {
+    actionError.value = { message }
     return false
   }
   return true
 }
-function addContainer() { form.data.containerRequirements.push({ containerType: '40HC', containerKind: 'FCL', capacityCbm: null, maxWeightKg: null, quantity: 1 }) }
+function addContainer() { form.data.containerRequirements.push(createBlankContainerRequirement()) }
 function removeContainer(index: number) { if (form.data.containerRequirements.length > 1) form.data.containerRequirements.splice(index, 1) }
 
 onMounted(() => { void load(); void loadOptions() })