diff --git a/Account-Server-Java-Demo/src/main/java/com/huawei/apidemo/TokenAPIDemo.java b/Account-Server-Java-Demo/src/main/java/com/huawei/apidemo/TokenAPIDemo.java
index 93d7043441d43f8d529fa67a1294c188d3870760..8358383bced08667c2bff82c5997f86d30ab53df 100644
--- a/Account-Server-Java-Demo/src/main/java/com/huawei/apidemo/TokenAPIDemo.java
+++ b/Account-Server-Java-Demo/src/main/java/com/huawei/apidemo/TokenAPIDemo.java
@@ -62,6 +62,7 @@ public class TokenAPIDemo {
         //By requesting the following URL to get code returned by the user to confirm the authorization
         // (url:https://oauth-login.cloud.huawei.com/oauth2/v3/authorize?response_type=code&access_type=offline&state=state_parameter_passthrough_value&client_id=101484061&redirect_uri=hms://redirect_url&scope=openid+profile)
         String code = "CV4e3VYs22cDEVydKG7KlKbz4UrU1G78V9f7i4wqMzjzQ4lcYa90XRw37fWrYoPz8L%2B%2BqH8QHZW82bsPQ3eSPrdpF585YrXsNR%2BcuEKGKKlalq6ref5%2FX7V2%2BZzwIF0yUrRwmxqHoM4kpj4kcGZ0rTrpOy7xG4%2B41rpEdF7tZPod0WeDkSTv0gDWWq%2B64%2BAFyxDv17gDsm0%3D";
+        // If the code is encoded by urlEncode once (eg. the value of the the preceding code ), please run the following to urlDecode once.
         code = java.net.URLDecoder.decode(code,   "utf-8");
 
         JSONObject tokens = getTokenByCode(redirect_uri, urlToken, code, client_secret, client_id, grant_type);