add

app/Http/Home/SoftController.php

@@ -246,7 +246,7 @@ class SoftController extends HttpBaseController
         $order = [
             'out_trade_no' => $orderInfo['order_no'],
             'total_amount' => $orderInfo['order_amount_total'],
-            'subject' => $orderInfo['order_no'],//'订单号：' . $orderInfo['order_no'],
+            'subject' => '订单号：' . $orderInfo['order_no'],
         ];
 
         try {