diff --git a/接收消息与回复.md b/接收消息与回复.md
index 3788718..64dd585 100644
--- a/接收消息与回复.md
+++ b/接收消息与回复.md
@@ -51,6 +51,7 @@ $server = new Server($appId, $token, $encodingAESKey);
 
 // 监听所有类型
 $server->on('message', function($message) {
+    // 获取用户openId: $openId = $message->FromUserName;
     return Message::make('text')->content('您好！');
 });