diff --git a/接收消息与回复.md b/接收消息与回复.md
index ba01764..774f911 100644
--- a/接收消息与回复.md
+++ b/接收消息与回复.md
@@ -9,10 +9,10 @@
 use Overtrue\Wechat\Server;
 
 $appId          = 'wx3cf0f39249eb0e60';
-$token          = 'hellotest';
-$encodingAESKey = 'EJThPazwzO4k1cyXJnwQtL60zBdhWvFaHb4emv0dLVN';
+$token          = 'hellotest'; // 可选
+$encodingAESKey = 'EJThPazwzO4k1cyXJnwQtL60zBdhWvFaHb4emv0dLVN'; // 可选
 
-$server = new Server($appId, $token, $encodingAESKey);
+$server = new Server($appId, $token, $encodingAESKey); // $token, $encodingAESKey 可以为空
 ```
 
 ### 接收消息