diff --git a/backend/internal/handler/stock_in.go b/backend/internal/handler/stock_in.go
index 0fe438b..4018a53 100644
--- a/backend/internal/handler/stock_in.go
+++ b/backend/internal/handler/stock_in.go
@@ -75,7 +75,9 @@ func (h *StockInHandler) List(c *gin.Context) {
 	query.Count(&total)
 
 	orders := make([]model.StockInOrder, 0)
-	query.Preload("Warehouse", "shop_id = ?", shopID).
+	// 列表卡片需要 items.length 显示品项数（手机端 MCard sub 行）
+	query.Preload("Items").
+		Preload("Warehouse", "shop_id = ?", shopID).
 		Preload("Partner", "shop_id = ?", shopID).
 		Preload("Operator", "shop_id = ?", shopID).
 		Preload("Reviewer", "shop_id = ?", shopID).
diff --git a/backend/internal/handler/stock_out.go b/backend/internal/handler/stock_out.go
index 6c9a81d..c5d72c7 100644
--- a/backend/internal/handler/stock_out.go
+++ b/backend/internal/handler/stock_out.go
@@ -87,7 +87,9 @@ func (h *StockOutHandler) List(c *gin.Context) {
 	query.Count(&total)
 
 	orders := make([]model.StockOutOrder, 0)
-	query.Preload("Warehouse", "shop_id = ?", shopID).
+	// 列表卡片需要 items.length 显示品项数（手机端 MCard sub 行）
+	query.Preload("Items").
+		Preload("Warehouse", "shop_id = ?", shopID).
 		Preload("Partner", "shop_id = ?", shopID).
 		Preload("Operator", "shop_id = ?", shopID).
 		Preload("Reviewer", "shop_id = ?", shopID).