diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/fleet/customer/FleetCustomerDirectory.java b/lastleg-service/src/main/java/com/baiyue/lastleg/fleet/customer/FleetCustomerDirectory.java
index aec4a4f23..34ceb75af 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/fleet/customer/FleetCustomerDirectory.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/fleet/customer/FleetCustomerDirectory.java
@@ -15,9 +15,12 @@ public class FleetCustomerDirectory {
         this.client = client; this.token = token;
     }
     public List<Customer> options(String keyword) { return load(keyword, null); }
-    public Customer required(long id) {
-        var customer = load(null, id).stream().filter(row -> row.id().equals(Long.toString(id))).findFirst()
+    public Customer find(String id) {
+        return load(null, Long.parseLong(id)).stream().filter(row -> row.id().equals(id)).findFirst()
             .orElseThrow(() -> new ResponseStatusException(HttpStatus.BAD_REQUEST, "请选择有效客户"));
+    }
+    public Customer required(long id) {
+        var customer = find(Long.toString(id));
         try {
             var result = client.eligibility(token, id);
             if (result == null || !result.successful() || result.data() == null) throw unavailable();
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 97a0b043d..e41a99b4f 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
@@ -45,6 +45,18 @@ public interface LastlegOrderMapper extends BaseMapper<LastlegOrder> {
 
     record OrderWeightRow(Long orderId, BigDecimal grossWeightKg, BigDecimal netWeightKg) { }
 
+    record ReturnVolumeRow(Long orderId, BigDecimal volumeCbm) { }
+
+    @Select("<script>SELECT m.orderId,SUM(m.length*m.width*m.height/1000000) AS volumeCbm FROM (" +
+        "SELECT o.lastleg_order_id AS orderId,r.length,r.width,r.height," +
+        "ROW_NUMBER() OVER (PARTITION BY r.return_order_id,r.unit_type,COALESCE(NULLIF(r.unit_code,''),r.receipt_no) " +
+        "ORDER BY r.signed_at DESC,r.id DESC) AS measurementNo " +
+        "FROM ll_return_receipt r JOIN ll_return_order o ON o.id=r.return_order_id AND o.customer_id=r.customer_id " +
+        "WHERE o.lastleg_order_id IN <foreach collection='orderIds' item='id' open='(' separator=',' close=')'>#{id}</foreach> " +
+        "AND r.unit_type IN ('PALLET','BOX') AND r.length IS NOT NULL AND r.width IS NOT NULL AND r.height IS NOT NULL" +
+        ") m WHERE m.measurementNo=1 GROUP BY m.orderId</script>")
+    List<ReturnVolumeRow> findReturnVolumes(@Param("orderIds") List<Long> orderIds);
+
     @Select("<script>SELECT o.id AS orderId," +
         "COALESCE(SUM(d.gross_weight_kg),MAX(i.gross_weight_kg),0) AS grossWeightKg," +
         "COALESCE(SUM(d.net_weight_kg),MAX(i.net_weight_kg),0) AS netWeightKg " +
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 845654c94..af1c428ee 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
@@ -265,7 +265,6 @@ public class RelabelApplicationService implements WalletResultHandler {
                 "INBOUND", null, null, List.of(), 0);
         }).filter(candidate -> candidate.availablePackages() > 0).toList());
         for (ReturnInventoryCarton carton : returnCartons.findAvailable(customerId, operationWarehouseId.trim())) {
-            if ("PARCEL".equals(carton.getSourceUnitType())) continue;
             String keyword = trim(inboundCode);
             if (StringUtils.hasText(keyword)
                 && !containsIgnoreCase(carton.getCartonMark(), keyword)
@@ -274,7 +273,7 @@ public class RelabelApplicationService implements WalletResultHandler {
                 .filter(item -> value(item.getQuantity()) > 0)
                 .map(item -> {
                     long used = returnCartons.relabelledQuantity(carton.getId(), item.getSkuCode());
-                    long remaining = value(item.getQuantity()) - used;
+                    long remaining = value(item.getQuantity()) - used - value(item.getPackingReservedQuantity());
                     return new RelabelResponses.SkuItem(item.getSkuCode(), null,
                         Math.toIntExact(Math.max(remaining, 0)), null);
                 }).filter(item -> item.quantity() > 0).toList();
@@ -288,7 +287,7 @@ public class RelabelApplicationService implements WalletResultHandler {
             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, relabelledPackages));
+                "PARCEL".equals(carton.getSourceUnitType()) ? "RETURN_PARCEL" : "RETURN_CARTON", carton.getId(), carton.getCartonMark(), cartonSkus, relabelledPackages));
         }
         return result;
     }
@@ -392,6 +391,21 @@ 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");
                 }
+                if (!carton.getCartonMark().equals(item.cartonMark().trim()))
+                    throw conflict("来源退货箱号与选择的库存不一致");
+                if ("PARCEL".equals(carton.getSourceUnitType()) && !"SKU_LABEL".equals(item.operationType()))
+                    throw conflict("散件退货库存只能贴 SKU，请先合箱后申请箱唛或混贴");
+                final long sourceReturnCartonId = carton.getId();
+                Map<String, Long> availableSku = returnCartonItems.lockCarton(sourceReturnCartonId).stream()
+                    .collect(Collectors.toMap(line -> line.getSkuCode().toUpperCase(java.util.Locale.ROOT),
+                        line -> Math.max(0, value(line.getQuantity()) - value(line.getPackingReservedQuantity())
+                            - returnCartons.relabelledQuantity(sourceReturnCartonId, line.getSkuCode())), Long::sum));
+                Map<String, Long> requestedSku = new java.util.HashMap<>();
+                if (item.skuItems() != null) for (var skuItem : item.skuItems()) {
+                    long quantity = requestedSku.merge(skuItem.skuCode().toUpperCase(java.util.Locale.ROOT), (long) skuItem.quantity(), Long::sum);
+                    if (quantity > availableSku.getOrDefault(skuItem.skuCode().toUpperCase(java.util.Locale.ROOT), 0L))
+                        throw conflict("SKU " + skuItem.skuCode() + " 的换标数量超过来源箱可用数量");
+                }
                 if (returnCartonItems.lockCarton(carton.getId()).stream().anyMatch(line -> value(line.getPackingReservedQuantity()) > 0))
                     throw conflict("退货箱SKU已被合箱计划锁定");
                 if (Set.of("CARTON_LABEL", "CARTON_AND_SKU").contains(item.operationType())
@@ -477,6 +491,17 @@ public class RelabelApplicationService implements WalletResultHandler {
                 throw conflict("退货箱状态已变化，请刷新后重试");
             }
         }
+        for (String returnNo : selectedReturnCartons.values().stream().map(ReturnInventoryCarton::getSourceReturnNo)
+            .filter(StringUtils::hasText).distinct().sorted().toList()) {
+            ReturnOrder returnOrder = returnOrders.lockCustomerNo(customerId, returnNo);
+            if (returnOrder != null) {
+                returnOrder.setRelabelApplicationId(applicationId);
+                returnOrder.setRelabelNo(relabelNo);
+                returnOrder.setRelabelStatus("PENDING_REVIEW");
+                returnOrder.setUpdatedAt(now);
+                returnOrders.updateById(returnOrder);
+            }
+        }
 
         if (requiresWallet) {
             String walletEventId = walletCommands.publish("FREEZE", Long.parseLong(customerId), "RELABEL_ORDER",
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderController.java b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderController.java
index 09e870bb6..d83bcb4d2 100644
--- a/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderController.java
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderController.java
@@ -24,6 +24,11 @@ public class MerchantReturnOrderController {
     @PostMapping @PreAuthorize("hasAuthority('" + OverseasPermissions.MERCHANT_RETURN_ORDER_CREATE + "')")
     public ApiResponse<ReturnOrderResponses.Detail> create(@AuthenticationPrincipal AuthenticatedUser user,
         @Valid @RequestBody ReturnOrderRequests.Create request) { return ApiResponse.success(service.create(customer(user), operator(user), request)); }
+    @PutMapping("/{returnNo}") @PreAuthorize("hasAuthority('" + OverseasPermissions.MERCHANT_RETURN_ORDER_CREATE + "')")
+    public ApiResponse<ReturnOrderResponses.Detail> update(@AuthenticationPrincipal AuthenticatedUser user,
+        @PathVariable String returnNo, @Valid @RequestBody ReturnOrderRequests.Create request) {
+        return ApiResponse.success(service.updatePending(customer(user), returnNo, request));
+    }
     @GetMapping @PreAuthorize("hasAuthority('" + OverseasPermissions.MERCHANT_RETURN_ORDER_LIST + "')")
     public ApiResponse<PageResult<ReturnOrderResponses.Summary>> page(@AuthenticationPrincipal AuthenticatedUser user,
         @Valid ReturnOrderRequests.Query query) { return ApiResponse.success(service.page(customer(user), query)); }
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 2d33068cc..dbc8c76c7 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
@@ -1,6 +1,7 @@
 package com.baiyue.lastleg.returnreceipt.dto;
 
 import java.time.LocalDateTime;
+import java.math.BigDecimal;
 import java.util.List;
 
 public final class ReturnOrderResponses {
@@ -22,9 +23,10 @@ public final class ReturnOrderResponses {
                                 String skuCode, long quantity, LocalDateTime createdAt) { }
     public record Photo(long fileId, String fileName, String contentType, long sizeBytes) { }
     public record PalletDetail(String palletCode, int skuTypes, long totalQuantity, List<PalletItem> items,
-                               long totalBoxCount, String unitType, String unitCode) {
+                               long totalBoxCount, String unitType, String unitCode,
+                               BigDecimal length, BigDecimal width, BigDecimal height, BigDecimal weight, BigDecimal volumeCbm) {
         public PalletDetail(String palletCode, int skuTypes, long totalQuantity, List<PalletItem> items) {
-            this(palletCode, skuTypes, totalQuantity, items, 0, "PALLET", palletCode);
+            this(palletCode, skuTypes, totalQuantity, items, 0, "PALLET", palletCode, null, null, null, null, null);
         }
     }
     public record PalletItem(String skuCode, String productNameZh, long quantity, long boxCount) {
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 bf5b4e3ec..f32ec0f1d 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
@@ -78,6 +78,7 @@ public class ReturnReceiptService {
     @Resource private RelabelItemMapper relabelItems;
     @Resource private com.baiyue.lastleg.relabel.pda.gateway.RelabelPhotoFileGateway photoFiles;
     @Resource private com.baiyue.lastleg.service.FbaWarehouseValidator fbaWarehouseValidator;
+    @Resource private com.baiyue.lastleg.service.ReturnOrderReferenceResolver returnOrderReferences;
 
     @Transactional
     public ReturnOrderResponses.Detail create(String customerId, String operatorId, ReturnOrderRequests.Create request) {
@@ -130,9 +131,14 @@ public class ReturnReceiptService {
         tail.setSourceOrderNo(returnOrder.getReturnNo()); tail.setOverseasWarehouseId(returnOrder.getOverseasWarehouseId());
         tail.setCurrentStatus(PENDING_REVIEW); tail.setSubOrderStatus(Boolean.TRUE.equals(returnOrder.getNeedRelabel()) ? "RETURN_RELABEL:PENDING_REVIEW" : "RETURN_RELABEL:NOT_REQUIRED");
         tail.setRelabelStatus(Boolean.TRUE.equals(returnOrder.getNeedRelabel()) ? PENDING_REVIEW : "NOT_REQUIRED");
+        // A return forecast is already the source of truth for the expected cargo.
+        // Keep the tail-leg snapshot useful before PDA receipt facts exist.
+        tail.setPackageCount(returnOrder.getExpectedQuantity() == null ? 0 : Math.toIntExact(returnOrder.getExpectedQuantity()));
+        tail.setProductQuantity(returnOrder.getExpectedQuantity() == null ? 0 : Math.toIntExact(returnOrder.getExpectedQuantity()));
         tail.setCustomerRemark(returnOrder.getRemark()); tail.setSourceEventId("RETURN_ORDER:" + returnOrder.getReturnNo());
         tail.setSourceLoadingPlanId("RETURN_RELABEL"); tail.setCreatedAt(now); tail.setUpdatedAt(now);
         tail.setSourcePayloadHash(returnOrder.getRequestHash());
+        returnOrderReferences.populate(List.of(tail));
         lastlegOrders.insert(tail);
         returnOrder.setLastlegOrderId(tail.getId()); returnOrder.setLastlegOrderNo(tail.getOrderNo());
         returnOrder.setRelabelStatus(Boolean.TRUE.equals(returnOrder.getNeedRelabel()) ? "PENDING_BINDING" : "NOT_REQUIRED");
@@ -207,12 +213,35 @@ public class ReturnReceiptService {
         if (order == null) return;
         Map<String, ReturnOrderItem> bySku = orderItems.listOrder(order.getId()).stream()
             .collect(java.util.stream.Collectors.toMap(ReturnOrderItem::getSkuCode, value -> value, (left, right) -> left, LinkedHashMap::new));
-        for (ReturnReceipt receipt : receipts.listOrder(order.getId())) {
+        List<ReturnReceipt> returnReceipts = receipts.listOrder(order.getId());
+        for (ReturnReceipt receipt : returnReceipts) {
             List<Allocation> allocations = receiptItems.listReceipt(receipt.getId()).stream()
                 .map(line -> new Allocation(bySku.get(line.getSkuCode()), value(line.getReceivedQuantity())))
                 .filter(item -> item.item() != null).toList();
             if (!allocations.isEmpty()) syncTailCargo(order, receipt, allocations, receipt.getSignedAt() == null ? LocalDateTime.now() : receipt.getSignedAt());
         }
+        // Pending forecasts have no receipt rows yet, but their SKU forecast must
+        // still be visible in the platform tail-order cargo tab.
+        if (returnReceipts.isEmpty() && lastlegOrderDetails.selectCount(new LambdaQueryWrapper<LastlegOrderDetail>()
+            .eq(LastlegOrderDetail::getCustomerId, customerId).eq(LastlegOrderDetail::getOrderId, tailOrderId)) == 0) {
+            int total = 0;
+            for (ReturnOrderItem item : orderItems.listOrder(order.getId())) {
+                int quantity = Math.toIntExact(value(item.getExpectedQuantity()));
+                LastlegOrderDetail detail = new LastlegOrderDetail();
+                detail.setId(IdWorker.getId()); detail.setCustomerId(customerId); detail.setOrderId(tailOrderId);
+                detail.setSourceInboundDetailId("RETURN_ORDER:" + order.getReturnNo() + ":" + item.getSkuCode());
+                detail.setSkuCode(item.getSkuCode()); detail.setProductNameZh(item.getProductNameZh());
+                detail.setPackageCount(quantity); detail.setProductQuantity(quantity);
+                lastlegOrderDetails.insert(detail); total = Math.addExact(total, quantity);
+            }
+            if (total > 0) {
+                LastlegOrder tail = lastlegOrders.selectById(tailOrderId);
+                if (tail != null) {
+                    tail.setPackageCount(total); tail.setProductQuantity(total); tail.setUpdatedAt(LocalDateTime.now());
+                    lastlegOrders.updateById(tail);
+                }
+            }
+        }
     }
 
     @Transactional(readOnly = true)
@@ -243,12 +272,16 @@ public class ReturnReceiptService {
         Map<String, Map<String, ReturnOrderResponses.PalletItem>> palletItems = new LinkedHashMap<>();
         Map<String, String> palletTypes = new LinkedHashMap<>();
         Map<String, Long> physicalBoxes = new LinkedHashMap<>();
+        Map<String, ReturnReceipt> physicalMeasurements = new LinkedHashMap<>();
         for (ReturnReceipt receipt : orderReceipts) {
             if (!"PALLET".equals(receipt.getUnitType()) && !"BOX".equals(receipt.getUnitType())) continue;
             String physicalCode = text(receipt.getUnitCode()) == null ? text(receipt.getPalletCode()) : text(receipt.getUnitCode());
             if (physicalCode == null) continue;
             String key = receipt.getUnitType() + ":" + physicalCode;
             palletTypes.put(key, receipt.getUnitType());
+            // A pallet is one physical carrier even when signed in several batches.
+            // Keep its latest measurement instead of adding the same carrier's volume twice.
+            if (receipt.getLength() != null && receipt.getWidth() != null && receipt.getHeight() != null) physicalMeasurements.putIfAbsent(key, receipt);
             physicalBoxes.merge(key, value(receipt.getTotalBoxCount()), Long::sum);
             Map<String, ReturnOrderResponses.PalletItem> bySku = palletItems.computeIfAbsent(key, ignored -> new LinkedHashMap<>());
             for (ReturnReceiptItem line : receiptItems.listReceipt(receipt.getId())) bySku.merge(line.getSkuCode(),
@@ -258,8 +291,12 @@ public class ReturnReceiptService {
         List<ReturnOrderResponses.PalletDetail> palletViews = palletItems.entrySet().stream().map(entry -> {
             List<ReturnOrderResponses.PalletItem> palletLines = List.copyOf(entry.getValue().values());
             String[] parts = entry.getKey().split(":", 2);
+            ReturnReceipt measured = physicalMeasurements.get(entry.getKey());
             return new ReturnOrderResponses.PalletDetail(parts.length > 1 ? parts[1] : entry.getKey(), palletLines.size(), palletLines.stream().mapToLong(ReturnOrderResponses.PalletItem::quantity).sum(), palletLines,
-                physicalBoxes.getOrDefault(entry.getKey(), 0L), palletTypes.get(entry.getKey()), parts.length > 1 ? parts[1] : entry.getKey());
+                physicalBoxes.getOrDefault(entry.getKey(), 0L), palletTypes.get(entry.getKey()), parts.length > 1 ? parts[1] : entry.getKey(),
+                measured == null ? null : measured.getLength(), measured == null ? null : measured.getWidth(),
+                measured == null ? null : measured.getHeight(), measured == null ? null : measured.getWeight(),
+                measured == null ? null : measured.getLength().multiply(measured.getWidth()).multiply(measured.getHeight()).divide(java.math.BigDecimal.valueOf(1_000_000)));
         }).toList();
         List<ReturnOrderResponses.Photo> photos = photoList(order).stream()
             .map(file -> new ReturnOrderResponses.Photo(file.fileId(), file.fileName(), file.contentType(), file.sizeBytes())).toList();
@@ -662,9 +699,17 @@ public class ReturnReceiptService {
         tail.setReceivedPackageCount(Math.addExact(tail.getReceivedPackageCount() == null ? 0 : tail.getReceivedPackageCount(), packageCount));
         tail.setProductQuantity(Math.addExact(tail.getProductQuantity() == null ? 0 : tail.getProductQuantity(), Math.toIntExact(allocations.stream().mapToLong(Allocation::quantity).sum())));
         if ("PALLET".equals(receipt.getUnitType())) tail.setPalletCount(Math.addExact(tail.getPalletCount() == null ? 0 : tail.getPalletCount(), 1));
-        if (receipt.getLength() != null && receipt.getWidth() != null && receipt.getHeight() != null) {
-            tail.setVolumeCbm(receipt.getLength().multiply(receipt.getWidth()).multiply(receipt.getHeight()).divide(java.math.BigDecimal.valueOf(1_000_000)));
+        // Recalculate from physical carriers; signing another pallet must not overwrite the first pallet's volume.
+        Map<String, ReturnReceipt> measuredUnits = new LinkedHashMap<>();
+        List<ReturnReceipt> signedReceipts = new ArrayList<>(receipts.listOrder(order.getId()));
+        if (signedReceipts.stream().noneMatch(line -> Objects.equals(line.getId(), receipt.getId()))) signedReceipts.add(0, receipt);
+        for (ReturnReceipt signed : signedReceipts) {
+            if (signed.getLength() == null || signed.getWidth() == null || signed.getHeight() == null || "PARCEL".equals(signed.getUnitType())) continue;
+            String code = text(signed.getUnitCode()) == null ? signed.getReceiptNo() : signed.getUnitCode();
+            measuredUnits.putIfAbsent(signed.getUnitType() + ":" + code, signed);
         }
+        tail.setVolumeCbm(measuredUnits.values().stream().map(line -> line.getLength().multiply(line.getWidth()).multiply(line.getHeight())
+            .divide(java.math.BigDecimal.valueOf(1_000_000))).reduce(java.math.BigDecimal.ZERO, java.math.BigDecimal::add));
         tail.setActualArrivalAt(tail.getActualArrivalAt() == null ? now : tail.getActualArrivalAt());
         tail.setUpdatedAt(now); lastlegOrders.updateById(tail);
     }
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 771723207..a2e1807ff 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
@@ -84,6 +84,7 @@ public class LastlegOrderService {
     @Resource private ContainerArrivalTimeOperationMapper containerArrivalTimeOperations;
     @Resource private WarehouseResourceGateway warehouseResourceGateway;
     @Resource private ContainerShippingGateMapper containerShippingGates;
+    @Resource private ReturnOrderReferenceResolver returnOrderReferences;
 
     public PageResult<LastlegOrderSummary> page(String customerId, LastlegOrderRequests.Query query) {
         return page(customerId, query, null);
@@ -93,6 +94,8 @@ public class LastlegOrderService {
         Page<LastlegOrder> page = orderMapper.selectPage(
             new Page<>(query.page(), query.size()), filter(customerId, query, relabelNo).orderByDesc(LastlegOrder::getCreatedAt).orderByDesc(LastlegOrder::getId));
         Map<Long, List<LastlegOrderMapper.PalletMergeRelationRow>> mergeRelations = palletMergeRelations(page.getRecords());
+        returnOrderReferences.populateForRead(page.getRecords());
+        refreshReturnVolumes(page.getRecords());
         Map<String, String> containerNodes = containerNodes(page.getRecords());
         Map<Long, String> dispatchStatuses = dispatchStatuses(page.getRecords());
         Map<Long, LastlegOrderMapper.OrderWeightRow> weights = orderWeights(page.getRecords());
@@ -331,6 +334,8 @@ public class LastlegOrderService {
 
     public LastlegOrderDetailResponse detail(String customerId, long orderId) {
         LastlegOrder order = findOwned(customerId, orderId);
+        returnOrderReferences.populateForRead(List.of(order));
+        refreshReturnVolumes(List.of(order));
         List<LastlegOrderDetail> cargo = detailMapper.selectList(new LambdaQueryWrapper<LastlegOrderDetail>()
             .eq(LastlegOrderDetail::getCustomerId, order.getCustomerId())
             .eq(LastlegOrderDetail::getOrderId, orderId).orderByAsc(LastlegOrderDetail::getId));
@@ -596,6 +601,14 @@ public class LastlegOrderService {
             LastlegOrderMapper.DispatchStatusRow::dispatchStatus));
     }
 
+    private void refreshReturnVolumes(List<LastlegOrder> orders) {
+        List<Long> ids = orders.stream().filter(order -> "RETURN_RELABEL".equals(order.getOrderType())).map(LastlegOrder::getId).toList();
+        if (ids.isEmpty()) return;
+        Map<Long, BigDecimal> volumes = orderMapper.findReturnVolumes(ids).stream()
+            .collect(Collectors.toMap(LastlegOrderMapper.ReturnVolumeRow::orderId, LastlegOrderMapper.ReturnVolumeRow::volumeCbm));
+        for (LastlegOrder order : orders) if (volumes.containsKey(order.getId())) order.setVolumeCbm(volumes.get(order.getId()));
+    }
+
     private Map<Long, LastlegOrderMapper.OrderWeightRow> orderWeights(List<LastlegOrder> orders) {
         if (orders.isEmpty()) return Map.of();
         List<LastlegOrderMapper.OrderWeightRow> rows = orderMapper.findOrderWeights(
diff --git a/lastleg-service/src/main/java/com/baiyue/lastleg/service/ReturnOrderReferenceResolver.java b/lastleg-service/src/main/java/com/baiyue/lastleg/service/ReturnOrderReferenceResolver.java
new file mode 100644
index 000000000..1152f9cd4
--- /dev/null
+++ b/lastleg-service/src/main/java/com/baiyue/lastleg/service/ReturnOrderReferenceResolver.java
@@ -0,0 +1,62 @@
+package com.baiyue.lastleg.service;
+
+import com.baiyue.lastleg.entity.LastlegOrder;
+import com.baiyue.lastleg.fleet.customer.FleetCustomerDirectory;
+import com.baiyue.lastleg.inboundplan.pda.gateway.WarehouseResourceGateway;
+import org.springframework.stereotype.Service;
+import org.springframework.util.StringUtils;
+import org.springframework.web.server.ResponseStatusException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/** Return snapshots come from the owning services, never another service's database. */
+@Service
+public class ReturnOrderReferenceResolver {
+    private static final Logger log = LoggerFactory.getLogger(ReturnOrderReferenceResolver.class);
+    private final FleetCustomerDirectory customers;
+    private final WarehouseResourceGateway warehouses;
+
+    public ReturnOrderReferenceResolver(FleetCustomerDirectory customers, WarehouseResourceGateway warehouses) {
+        this.customers = customers;
+        this.warehouses = warehouses;
+    }
+
+    public void populate(List<LastlegOrder> orders) {
+        populate(orders, true);
+    }
+
+    public void populateForRead(List<LastlegOrder> orders) {
+        populate(orders, false);
+    }
+
+    private void populate(List<LastlegOrder> orders, boolean required) {
+        Map<String, FleetCustomerDirectory.Customer> customerReferences = new HashMap<>();
+        Map<String, WarehouseResourceGateway.WarehouseReference> warehouseReferences = new HashMap<>();
+        for (LastlegOrder order : orders) {
+            if (!"RETURN_RELABEL".equals(order.getOrderType())) continue;
+            if (!StringUtils.hasText(order.getCustomerName())) {
+                try {
+                    var customer = customerReferences.computeIfAbsent(order.getCustomerId(), customers::find);
+                    order.setCustomerName(customer.name());
+                } catch (ResponseStatusException error) {
+                    if (required) throw error;
+                    log.warn("Return customer reference unavailable for order {}, status {}", order.getId(), error.getStatusCode().value());
+                }
+            }
+            if (!StringUtils.hasText(order.getOverseasWarehouseCode()) || !StringUtils.hasText(order.getOverseasWarehouseName())) {
+                try {
+                    var warehouse = warehouseReferences.computeIfAbsent(order.getOverseasWarehouseId(),
+                        id -> warehouses.requireActiveSharedWarehouse(Long.parseLong(id)));
+                    order.setOverseasWarehouseCode(warehouse.warehouseCode());
+                    order.setOverseasWarehouseName(warehouse.warehouseName());
+                } catch (ResponseStatusException error) {
+                    if (required) throw error;
+                    log.warn("Return warehouse reference unavailable for order {}, status {}", order.getId(), error.getStatusCode().value());
+                }
+            }
+        }
+    }
+}
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 93fac93d8..be80fd7ca 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
@@ -895,6 +895,30 @@ class RelabelApplicationServiceTest {
         return app;
     }
 
+    @Test
+    void returnSkuRelabelRejectsQuantityBeyondSelectedSourceBox() {
+        var cartonMapper = org.mockito.Mockito.mock(com.baiyue.lastleg.returnreceipt.mapper.ReturnInventoryCartonMapper.class);
+        var lineMapper = org.mockito.Mockito.mock(com.baiyue.lastleg.returnreceipt.mapper.ReturnInventoryCartonItemMapper.class);
+        ReflectionTestUtils.setField(service, "returnCartons", cartonMapper);
+        ReflectionTestUtils.setField(service, "returnCartonItems", lineMapper);
+        var carton = new com.baiyue.lastleg.returnreceipt.entity.ReturnInventoryCarton();
+        carton.setId(901L); carton.setCustomerId("10001"); carton.setOverseasWarehouseId("WH-1");
+        carton.setCartonMark("RETURN-BOX-1"); carton.setStatus("AVAILABLE"); carton.setSourceUnitType("BOX");
+        var line = new com.baiyue.lastleg.returnreceipt.entity.ReturnInventoryCartonItem();
+        line.setSkuCode("SKU-A"); line.setQuantity(5L); line.setPackingReservedQuantity(0L);
+        when(cartonMapper.lockId(901L)).thenReturn(carton);
+        when(lineMapper.lockCarton(901L)).thenReturn(List.of(line));
+        var detail = new RelabelRequests.Item(null, null, null, "SKU-A", null, null, null,
+            "Return goods", 1, 1, "RT-1", null, "NEW-A", null, null,
+            null, null, null, "RETURN-BOX-1", null, null, "SKU_LABEL",
+            List.of(new RelabelRequests.SkuItem("SKU-A", "NEW-A", 6, null)), 901L);
+        var request = new RelabelRequests.Create("RT-1", "WH-1", LocalDateTime.now().plusDays(1),
+            "Li", "13800000000", null, null, "return-over-quantity", List.of(detail), null, false);
+        var error = assertThrows(ResponseStatusException.class, () -> service.create("10001", "operator-1", request));
+        assertTrue(error.getReason().contains("超过来源箱可用数量"));
+        verify(applications, never()).insert(any(RelabelApplication.class));
+    }
+
     private void stubDetail(RelabelApplication application) {
         when(applications.findNo(application.getCustomerId(), application.getRelabelNo())).thenReturn(application);
         when(items.selectList(any())).thenReturn(List.of(item(31L, application.getId(), "SKU-A", 10, 6)));
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderControllerTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderControllerTest.java
new file mode 100644
index 000000000..f26c06dc7
--- /dev/null
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/returnreceipt/controller/MerchantReturnOrderControllerTest.java
@@ -0,0 +1,52 @@
+package com.baiyue.lastleg.returnreceipt.controller;
+
+import com.baiyue.common.security.AuthenticatedUser;
+import com.baiyue.lastleg.returnreceipt.dto.ReturnOrderRequests;
+import com.baiyue.lastleg.returnreceipt.service.ReturnReceiptService;
+import org.junit.jupiter.api.Test;
+import org.springframework.core.MethodParameter;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+
+import java.util.Set;
+
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.*;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.put;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+
+class MerchantReturnOrderControllerTest {
+    @Test
+    void putRoutesEditedForecastToAuthenticatedCustomer() throws Exception {
+        var service = mock(ReturnReceiptService.class);
+        var controller = new MerchantReturnOrderController();
+        ReflectionTestUtils.setField(controller, "service", service);
+        var user = new AuthenticatedUser(1L, 100L, 100L, 1L, "tester", "MERCHANT", "WEB", Set.of());
+        var mvc = MockMvcBuilders.standaloneSetup(controller).setCustomArgumentResolvers(new HandlerMethodArgumentResolver() {
+            public boolean supportsParameter(MethodParameter parameter) {
+                return parameter.getParameterType() == AuthenticatedUser.class;
+            }
+            public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer container,
+                                          NativeWebRequest request, WebDataBinderFactory factory) {
+                return user;
+            }
+        }).build();
+        mvc.perform(put("/api/merchant/v1/last-leg/return-orders/RT-TEST")
+            .contentType("application/json")
+            .content("""
+                {"overseasWarehouseId":"WH-1","warehouseContactName":"Updated contact",
+                 "warehouseContactPhone":"123456","customerReferenceNo":"REF-NEW",
+                 "needRelabel":true,"remark":"Updated remark","idempotencyKey":"edit-test",
+                 "items":[{"skuCode":"SKU-NEW","productNameZh":"Updated product","expectedQuantity":25}]}
+                """))
+            .andExpect(status().isOk());
+        verify(service).updatePending(eq("100"), eq("RT-TEST"), eq(new ReturnOrderRequests.Create(
+            "WH-1", "Updated contact", "123456", "REF-NEW", true, "Updated remark", "edit-test",
+            java.util.List.of(new ReturnOrderRequests.Item("SKU-NEW", "Updated product", 25)))));
+        verifyNoMoreInteractions(service);
+    }
+}
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 019a0db3b..a46f3c2bd 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
@@ -70,6 +70,7 @@ class ReturnReceiptServiceTest {
     @Mock RelabelItemMapper relabelItems;
     @Mock FbaWarehouseValidator fbaWarehouseValidator;
     @Mock RelabelPhotoFileGateway photoFiles;
+    @Mock com.baiyue.lastleg.service.ReturnOrderReferenceResolver returnOrderReferences;
 
     ReturnReceiptService service;
     PdaWarehouseIdentity identity;
@@ -91,6 +92,7 @@ class ReturnReceiptServiceTest {
         ReflectionTestUtils.setField(service, "relabelApplications", relabelApplications);
         ReflectionTestUtils.setField(service, "relabelItems", relabelItems);
         ReflectionTestUtils.setField(service, "fbaWarehouseValidator", fbaWarehouseValidator);
+        ReflectionTestUtils.setField(service, "returnOrderReferences", returnOrderReferences);
         identity = new PdaWarehouseIdentity("operator-1", "仓管员", 10L);
     }
 
@@ -110,6 +112,32 @@ class ReturnReceiptServiceTest {
         assertEquals(90L, result.receivedQuantity());
     }
 
+    @Test
+    void detailReturnsMeasurementsForBothPalletsAndDoesNotAddRepeatedCarrierVolume() {
+        ReturnOrder order = order("RT-TWO-PALLETS", "10", "COMPLETED", 10, 10);
+        when(orders.findNo("customer-1", "RT-TWO-PALLETS")).thenReturn(order);
+        ReturnReceipt first = measuredReceipt(1L, "PLT-A", "111", "11", "12");
+        ReturnReceipt second = measuredReceipt(2L, "PLT-B", "11", "21", "32");
+        ReturnReceipt earlier = measuredReceipt(3L, "PLT-A", "100", "10", "10");
+        when(receipts.listOrder(order.getId())).thenReturn(List.of(second, first, earlier));
+        var result = service.detail("customer-1", "RT-TWO-PALLETS");
+        assertEquals(2, result.pallets().size());
+        var palletA = result.pallets().stream().filter(row -> "PLT-A".equals(row.palletCode())).findFirst().orElseThrow();
+        var palletB = result.pallets().stream().filter(row -> "PLT-B".equals(row.palletCode())).findFirst().orElseThrow();
+        assertThat(palletA.volumeCbm()).isEqualByComparingTo("0.014652");
+        assertThat(palletB.volumeCbm()).isEqualByComparingTo("0.007392");
+        assertThat(palletA.length()).isEqualByComparingTo("111");
+        assertThat(palletB.weight()).isEqualByComparingTo("11");
+    }
+
+    private ReturnReceipt measuredReceipt(long id, String code, String length, String width, String height) {
+        ReturnReceipt receipt = new ReturnReceipt(); receipt.setId(id); receipt.setUnitType("PALLET"); receipt.setUnitCode(code);
+        receipt.setPalletCode(code); receipt.setTotalBoxCount(2L); receipt.setReceiptNo("RR-" + id);
+        receipt.setLength(new java.math.BigDecimal(length)); receipt.setWidth(new java.math.BigDecimal(width));
+        receipt.setHeight(new java.math.BigDecimal(height)); receipt.setWeight(new java.math.BigDecimal("11"));
+        return receipt;
+    }
+
     @Test
     void merchantPhotoDownloadUsesAuthenticatedCustomerAndResolvedReturnOrder() {
         ReflectionTestUtils.setField(service, "photoFiles", photoFiles);
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 8de551aaf..02ea84783 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
@@ -74,6 +74,7 @@ class LastlegOrderServiceTest {
     @Mock ContainerArrivalTimeOperationMapper containerArrivalTimeOperations;
     @Mock WarehouseResourceGateway warehouseResourceGateway;
     @Mock ContainerShippingGateMapper containerShippingGates;
+    @Mock ReturnOrderReferenceResolver returnOrderReferences;
     LastlegOrderService service;
 
     @Test
@@ -105,7 +106,10 @@ class LastlegOrderServiceTest {
 
     @BeforeEach
     void setUp() {
+        com.baomidou.mybatisplus.core.metadata.TableInfoHelper.initTableInfo(
+            new org.apache.ibatis.builder.MapperBuilderAssistant(new org.apache.ibatis.session.Configuration(), ""), LastlegOrder.class);
         service = new LastlegOrderService();
+        ReflectionTestUtils.setField(service, "returnOrderReferences", returnOrderReferences);
         ReflectionTestUtils.setField(service, "orderMapper", orders);
         ReflectionTestUtils.setField(service, "detailMapper", details);
         ReflectionTestUtils.setField(service, "historyMapper", histories);
diff --git a/lastleg-service/src/test/java/com/baiyue/lastleg/service/ReturnOrderReferenceResolverTest.java b/lastleg-service/src/test/java/com/baiyue/lastleg/service/ReturnOrderReferenceResolverTest.java
new file mode 100644
index 000000000..c56af968d
--- /dev/null
+++ b/lastleg-service/src/test/java/com/baiyue/lastleg/service/ReturnOrderReferenceResolverTest.java
@@ -0,0 +1,49 @@
+package com.baiyue.lastleg.service;
+
+import com.baiyue.lastleg.entity.LastlegOrder;
+import com.baiyue.lastleg.fleet.customer.FleetCustomerDirectory;
+import com.baiyue.lastleg.inboundplan.pda.gateway.WarehouseResourceGateway;
+import org.junit.jupiter.api.Test;
+import java.util.List;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.*;
+
+class ReturnOrderReferenceResolverTest {
+    @Test
+    void directoryFailureBlocksNewSnapshotButDoesNotHideHistoricalOrders() {
+        var customers = mock(FleetCustomerDirectory.class);
+        var warehouses = mock(WarehouseResourceGateway.class);
+        when(customers.find("1")).thenThrow(new org.springframework.web.server.ResponseStatusException(org.springframework.http.HttpStatus.SERVICE_UNAVAILABLE));
+        when(warehouses.requireActiveSharedWarehouse(10L)).thenReturn(new WarehouseResourceGateway.WarehouseReference(10L, "USLAX01", "洛杉矶仓", "ACTIVE"));
+        var resolver = new ReturnOrderReferenceResolver(customers, warehouses);
+        org.junit.jupiter.api.Assertions.assertThrows(org.springframework.web.server.ResponseStatusException.class, () -> resolver.populate(List.of(order())));
+        var historical = order();
+        resolver.populateForRead(List.of(historical));
+        assertEquals("洛杉矶仓", historical.getOverseasWarehouseName());
+    }
+
+    @Test
+    void resolvesMissingReturnReferencesOncePerCustomerAndWarehouseAndPreservesSnapshots() {
+        var customers = mock(FleetCustomerDirectory.class);
+        var warehouses = mock(WarehouseResourceGateway.class);
+        when(customers.find("1")).thenReturn(new FleetCustomerDirectory.Customer("1", "C1", "测试货主", null, null));
+        when(warehouses.requireActiveSharedWarehouse(10L)).thenReturn(new WarehouseResourceGateway.WarehouseReference(10L, "USLAX01", "洛杉矶仓", "ACTIVE"));
+        LastlegOrder first = order(), second = order(), frozen = order();
+        frozen.setCustomerName("原货主快照"); frozen.setOverseasWarehouseCode("OLD"); frozen.setOverseasWarehouseName("原仓库快照");
+
+        new ReturnOrderReferenceResolver(customers, warehouses).populate(List.of(first, second, frozen));
+
+        assertEquals("测试货主", first.getCustomerName());
+        assertEquals("USLAX01", second.getOverseasWarehouseCode());
+        assertEquals("洛杉矶仓", second.getOverseasWarehouseName());
+        assertEquals("原货主快照", frozen.getCustomerName());
+        assertEquals("原仓库快照", frozen.getOverseasWarehouseName());
+        verify(customers, times(1)).find("1");
+        verify(warehouses, times(1)).requireActiveSharedWarehouse(10L);
+    }
+
+    private LastlegOrder order() {
+        var order = new LastlegOrder(); order.setOrderType("RETURN_RELABEL");
+        order.setCustomerId("1"); order.setOverseasWarehouseId("10"); return order;
+    }
+}