diff --git a/app/user/cmd/api/internal/logic/pay/paymentlogic.go b/app/user/cmd/api/internal/logic/pay/paymentlogic.go
index f2deb3a..e189db7 100644
--- a/app/user/cmd/api/internal/logic/pay/paymentlogic.go
+++ b/app/user/cmd/api/internal/logic/pay/paymentlogic.go
@@ -50,11 +50,14 @@ func (l *PaymentLogic) Payment(req *types.PaymentReq) (resp *types.PaymentResp,
 	}
 
 	var prepayID string
-	outTradeNo := l.svcCtx.WechatPayService.GenerateOutTradeNo()
+	var outTradeNo string
+
 	var createOrderErr error
 	if req.PayMethod == "wechatpay" {
+		outTradeNo = l.svcCtx.WechatPayService.GenerateOutTradeNo()
 		prepayID, createOrderErr = l.svcCtx.WechatPayService.CreateWechatAppOrder(l.ctx, product.SellPrice, product.Description, outTradeNo)
 	} else {
+		outTradeNo = l.svcCtx.AlipayService.GenerateOutTradeNo()
 		prepayID, createOrderErr = l.svcCtx.AlipayService.CreateAlipayAppOrder(product.SellPrice, product.Description, outTradeNo)
 	}
 	if createOrderErr != nil {