diff --git a/point_trade/main.py b/point_trade/main.py
index 7e5ee05..a2fd708 100644
--- a/point_trade/main.py
+++ b/point_trade/main.py
@@ -96,7 +96,6 @@ class PointTrade:
                                (message.roomid if message.from_group() else message.sender), message.sender)
             return
 
-        # 从字典中提取字段
         sender_user_id = sender_result['id']
         sender_wx_id = sender_result['wx_id']
         sender_wx_nick_name = sender_result['wx_nick_name']
@@ -117,7 +116,6 @@ class PointTrade:
                 (message.roomid if message.from_group() else message.sender), message.sender)
             return
 
-        # 从字典中提取字段
         recipient_user_id = recipient_result['id']
         recipient_wx_id = recipient_result['wx_id']
         recipient_wx_nick_name = recipient_result['wx_nick_name']
@@ -146,10 +144,11 @@ class PointTrade:
             f"⌚️时间: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}"
         )
 
+        # 将整数转换为字符串后再 join
         self.wcf.send_text(
             output,
             (message.roomid if message.from_group() else message.sender),
-            ','.join({sender_user_id, recipient_user_id})
+            ','.join([str(sender_user_id), str(recipient_user_id)])
         )
 
     def _get_db_connection(self):