diff --git a/29WxOrderWpf/Windows/OrderWindows/TransitAfterSaleWindow.xaml.cs b/29WxOrderWpf/Windows/OrderWindows/TransitAfterSaleWindow.xaml.cs
index 300655c..5e6edaf 100644
--- a/29WxOrderWpf/Windows/OrderWindows/TransitAfterSaleWindow.xaml.cs
+++ b/29WxOrderWpf/Windows/OrderWindows/TransitAfterSaleWindow.xaml.cs
@@ -142,6 +142,7 @@ namespace _29WxOrderWpf.Windows.OrderWindows
         {
 			if (string.IsNullOrEmpty(lblWorkOrderMsg.Content.ParseToString()))
 			{
+				// 创建拦截退货包裹工单
 				var workOrder = AddWorkOrder();
 				if (!workOrder.Contains("\"success\":true"))
 				{
@@ -175,7 +176,7 @@ namespace _29WxOrderWpf.Windows.OrderWindows
             data["recipientPhone"] = txtMobile.Text.Trim();
             data["account_user"] = BaseClass.UserName;
             data["accountUser"] = BaseClass.UserName;
-			if (string.IsNullOrEmpty(TransitOrder.express_1_waybill) && string.IsNullOrEmpty(TransitOrder.express_2_waybill) &&
+			if (string.IsNullOrWhiteSpace(TransitOrder?.express_1_waybill) && string.IsNullOrWhiteSpace(TransitOrder?.express_2_waybill) &&
 				!string.IsNullOrWhiteSpace(txtWarehouseWaybill.Text) && !string.IsNullOrWhiteSpace(txtExpressName.Text.Trim()))
 			{
 				data["refundWaybill"] = txtWarehouseWaybill.Text.Trim();