diff --git a/netease_music_unlock.js b/netease_music_unlock.js
index b1e17fc..d50d601 100644
--- a/netease_music_unlock.js
+++ b/netease_music_unlock.js
@@ -1,26 +1,15 @@
 /**
- * @fileoverview Example of HTTP rewrite.
+ * @fileoverview unlock netease regional restriction
+ * 
+ * rewrite url: ^https?://(..)?music.163.com/
  *
  * @supported Quantumult X (v1.0.5-build173)
  */
 
-// $request, $response, $notify(title, subtitle, message), console.log(message)
-// $request.scheme, $request.method, $request.url, $request.path, $request.headers
-// $response.statusCode, $response.headers, $response.body
-//
-// $prefs is for persistent store and the data of $prefs will be cleared when Quantumult X is deleted.
-// $prefs.setValueForKey(value, key), $prefs.removeValueForKey(key), $prefs.removeAllValues(). Returns true or false, value and key should be string.
-// $prefs.valueForKey(key) returns value.
-//
-// setTimeout(function() { console.log("abc"); }, 1000);
-//
-// You can optional change the response headers at the same time by using $done({body: modifiedBody, headers: modifiedHeaders}); only change the response headers is not allowed for script-response-body. The modifiedHeaders can be copied and modified from $response.headers, please do not change the content length, type and encoding field.
-// Response status can also be optional changed by using $done({body: modifiedBody, headers: modifiedHeaders, status: modifiedStatus}), the modifiedStatus should be like "HTTP/1.1 200 OK"
-
 var body = $request.headers;
 var obj = JSON.parse(body);
 
-obj['X-Real-IP'] = "219.133.168.5";
+obj['X-Real-IP'] = "219.133.168.5"; // shenzhen futian
 body = JSON.stringify(obj);
 
 console.log(body);