diff --git a/README-CN.md b/README-CN.md
index 738d22af..b40fca6c 100644
--- a/README-CN.md
+++ b/README-CN.md
@@ -30,7 +30,7 @@ Alibaba Cloud Client for PHP 是帮助 PHP 开发者管理凭据、发送请求
 
 
 ## 先决条件
-您的系统需要满足[先决条件](docs/0-Prerequisites-CN.md)，包括 PHP> = 5.5。 我们强烈建议使用cURL扩展，并使用TLS后端编译cURL 7.16.2+。
+您的系统需要满足[先决条件](docs/zh/0-Prerequisites.md)，包括 PHP> = 5.5。 我们强烈建议使用cURL扩展，并使用TLS后端编译cURL 7.16.2+。
 
 
 ## 安装依赖
@@ -40,7 +40,7 @@ composer require alibabacloud/client
 ```
 > 一些用户可能由于网络问题无法安装，可以尝试切换 Composer 镜像地址。
 
-请看 [安装](docs/1-Installation-CN.md) 有关通过 Composer 和其他方式安装的详细信息。
+请看[安装](docs/zh/1-Installation.md)有关通过 Composer 和其他方式安装的详细信息。
 
 
 ## 快速使用
@@ -113,17 +113,17 @@ try {
 
 
 ## 文档
-* [先决条件](docs/0-Prerequisites-CN.md)
-* [安装](docs/1-Installation-CN.md)
-* [客户端](docs/2-Client-CN.md)
-* [请求](docs/3-Request-CN.md)
-* [结果](docs/4-Result-CN.md)
-* [区域](docs/5-Region-CN.md)
-* [域名](docs/6-Host-CN.md)
-* [SSL 验证](docs/7-Verify-CN.md)
-* [调试](docs/8-Debug-CN.md)
-* [日志](docs/9-Log-CN.md)
-* [测试](docs/10-Test-CN.md)
+* [先决条件](docs/zh/0-Prerequisites.md)
+* [安装](docs/zh/1-Installation.md)
+* [客户端](docs/zh/2-Client.md)
+* [请求](docs/zh/3-Request.md)
+* [结果](docs/zh/4-Result.md)
+* [区域](docs/zh/5-Region.md)
+* [域名](docs/zh/6-Host.md)
+* [SSL 验证](docs/zh/7-Verify.md)
+* [调试](docs/zh/8-Debug.md)
+* [日志](docs/zh/9-Log.md)
+* [测试](docs/zh/10-Test.md)
 
 
 ## 问题
diff --git a/README.md b/README.md
index eed06326..c7c179ed 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ Alibaba Cloud Client for PHP is a client tool that helps PHP developers manage c
 
 
 ## Prerequisites
-Your system will need to meet the [Prerequisites](docs/0-Prerequisites-EN.md), including having PHP >= 5.5. We highly recommend having it compiled with the cURL extension and cURL 7.16.2+.
+Your system will need to meet the [Prerequisites](docs/en/0-Prerequisites.md), including having PHP >= 5.5. We highly recommend having it compiled with the cURL extension and cURL 7.16.2+.
 
 
 ## Installation
@@ -40,7 +40,7 @@ composer require alibabacloud/client
 ```
 > Some users may not be able to install due to network problems, you can try to switch the Composer mirror.
 
-Please see the [Installation](docs/1-Installation-EN.md) for more detailed information about installing the Alibaba Cloud Client for PHP through Composer and other means.
+Please see the [Installation](docs/en/1-Installation.md) for more detailed information about installing the Alibaba Cloud Client for PHP through Composer and other means.
 
 
 ## Quick Examples
@@ -113,17 +113,17 @@ try {
 
 
 ## Documentation
-* [Prerequisites](docs/0-Prerequisites-EN.md)
-* [Installation](docs/1-Installation-EN.md)
-* [Client](docs/2-Client-EN.md)
-* [Request](docs/3-Request-EN.md)
-* [Result](docs/4-Result-EN.md)
-* [Region](docs/5-Region-EN.md)
-* [Host](docs/6-Host-EN.md)
-* [SSL Verify](docs/7-Verify-EN.md)
-* [Debug](docs/8-Debug-EN.md)
-* [Log](docs/9-Log-EN.md)
-* [Test](docs/10-Test-EN.md)
+* [Prerequisites](docs/en/0-Prerequisites.md)
+* [Installation](docs/en/1-Installation.md)
+* [Client](docs/en/2-Client.md)
+* [Request](docs/en/3-Request.md)
+* [Result](docs/en/4-Result.md)
+* [Region](docs/en/5-Region.md)
+* [Host](docs/en/6-Host.md)
+* [SSL Verify](docs/en/7-Verify.md)
+* [Debug](docs/en/8-Debug.md)
+* [Log](docs/en/9-Log.md)
+* [Test](docs/en/10-Test.md)
 
 
 ## Issues
diff --git a/docs/8-Debug-CN.md b/docs/8-Debug-CN.md
deleted file mode 100644
index cc4cfbf3..00000000
--- a/docs/8-Debug-CN.md
+++ /dev/null
@@ -1,8 +0,0 @@
-[← SSL 验证](7-Verify-CN.md) | 调试[(English)](8-Debug-EN.md) | [日志 →](9-Log-CN.md)
-***
-
-# 调试
-如果存在环境变量 `DEBUG=sdk` ，所有请求将启用调试输出。
-
-***
-[← SSL 验证](7-Verify-CN.md) | 调试[(English)](8-Debug-EN.md) | [日志 →](9-Log-CN.md)
diff --git a/docs/8-Debug-EN.md b/docs/8-Debug-EN.md
deleted file mode 100644
index 7a80382f..00000000
--- a/docs/8-Debug-EN.md
+++ /dev/null
@@ -1,8 +0,0 @@
-[← SSL Verify](7-Verify-EN.md) | Debug[(中文)](8-Debug-CN.md) | [Log →](9-Log-EN.md)
-***
-
-# Debugging
-If there is an environment variable `DEBUG=sdk` , all requests will enable debug mode.
-
-***
-[← SSL Verify](7-Verify-EN.md) | Debug[(中文)](8-Debug-CN.md) | [Log →](9-Log-EN.md)
diff --git a/docs/0-Prerequisites-EN.md b/docs/en/0-Prerequisites.md
similarity index 77%
rename from docs/0-Prerequisites-EN.md
rename to docs/en/0-Prerequisites.md
index 75e74d2a..8b4d1135 100644
--- a/docs/0-Prerequisites-EN.md
+++ b/docs/en/0-Prerequisites.md
@@ -1,4 +1,4 @@
-[← Home](../README.md) | Prerequisites[(中文)](0-Prerequisites-CN.md) | [Installation →](1-Installation-EN.md)
+[← Home](../../README.md) | Prerequisites[(中文)](../zh/0-Prerequisites.md) | [Installation →](1-Installation.md)
 ***
 
 # Requirements and Recommendations
@@ -16,7 +16,7 @@ Before using the Alibaba Cloud Client for PHP, please ensure your environment su
 - In a production environment, do not use [Xdebug][xdebug]
 
 ***
-[← Home](../README.md) | Prerequisites[(中文)](0-Prerequisites-CN.md) | [Installation →](1-Installation-EN.md)
+[← Home](../../README.md) | Prerequisites[(中文)](../zh/0-Prerequisites.md) | [Installation →](1-Installation.md)
 
 [composer]: https://getcomposer.org
 [cURL]: http://php.net/manual/en/book.curl.php
diff --git a/docs/1-Installation-EN.md b/docs/en/1-Installation.md
similarity index 88%
rename from docs/1-Installation-EN.md
rename to docs/en/1-Installation.md
index c739b5a4..b1981130 100644
--- a/docs/1-Installation-EN.md
+++ b/docs/en/1-Installation.md
@@ -1,4 +1,4 @@
-[← Prerequisites](0-Prerequisites-EN.md) | Installation[(中文)](1-Installation-CN.md) | [Client →](2-Client-EN.md)
+[← Prerequisites](0-Prerequisites.md) | Installation[(中文)](../zh/1-Installation.md) | [Client →](2-Client.md)
 ***
 
 # Installation
@@ -7,7 +7,7 @@ There are ways to install Alibaba Cloud Client for PHP:
 - [As a dependency via Composer](#as-a-dependency-via-composer)
 - [Installing by Using the ZIP file](#installing-by-using-the-zip-file)
 
-Before you install ensure your environment is using PHP version 5.5 or later. Learn more about [environment requirements and recommendations](0-Prerequisites-EN.md).
+Before you install ensure your environment is using PHP version 5.5 or later. Learn more about [environment requirements and recommendations](0-Prerequisites.md).
 
 ## As a dependency via Composer
 Composer is the recommended way to install. Composer is a tool for PHP that manages and installs the dependencies of your project. For more information on how to install Composer, configure autoloading, and follow other best practices for defining dependencies, see [getcomposer.org](https://getcomposer.org).
@@ -50,4 +50,4 @@ require __DIR__ . '/vendor/autoload.php';
 ```
 
 ***
-[← Prerequisites](0-Prerequisites-EN.md) | Installation[(中文)](1-Installation-CN.md) | [Client →](2-Client-EN.md)
+[← Prerequisites](0-Prerequisites.md) | Installation[(中文)](../zh/1-Installation.md) | [Client →](2-Client.md)
diff --git a/docs/10-Test-EN.md b/docs/en/10-Test.md
similarity index 88%
rename from docs/10-Test-EN.md
rename to docs/en/10-Test.md
index 1d73870d..32608c03 100644
--- a/docs/10-Test-EN.md
+++ b/docs/en/10-Test.md
@@ -1,4 +1,4 @@
-[← Log](9-Log-EN.md) | Test[(中文)](10-Test-CN.md) | [Home →](../README.md)
+[← Log](9-Log.md) | Test[(中文)](../zh/10-Test.md) | [Home →](../../README.md)
 ***
 
 # Test
@@ -67,4 +67,4 @@ AlibabaCloud::cancelMock();
 ```
 
 ***
-[← Log](9-Log-EN.md) | Test[(中文)](10-Test-CN.md) | [Home →](../README.md)
+[← Log](9-Log.md) | Test[(中文)](../zh/10-Test.md) | [Home →](../../README.md)
diff --git a/docs/2-Client-EN.md b/docs/en/2-Client.md
similarity index 98%
rename from docs/2-Client-EN.md
rename to docs/en/2-Client.md
index d72d706c..8b0d80ec 100644
--- a/docs/2-Client-EN.md
+++ b/docs/en/2-Client.md
@@ -1,4 +1,4 @@
-[← Installation](1-Installation-EN.md) | Client[(中文)](2-Client-CN.md) | [Request →](3-Request-EN.md)
+[← Installation](1-Installation.md) | Client[(中文)](../zh/2-Client.md) | [Request →](3-Request.md)
 ***
 
 # Client
@@ -213,7 +213,7 @@ AlibabaCloud::get('client1')->getSessionCredential();
 ```
 
 ***
-[← Installation](1-Installation-EN.md) | Client[(中文)](2-Client-CN.md) | [Request →](3-Request-EN.md)
+[← Installation](1-Installation.md) | Client[(中文)](../zh/2-Client.md) | [Request →](3-Request.md)
 
 [ak]: https://usercenter.console.aliyun.com/#/manage/ak
 [ram]: https://ram.console.aliyun.com/users
diff --git a/docs/3-Request-EN.md b/docs/en/3-Request.md
similarity index 97%
rename from docs/3-Request-EN.md
rename to docs/en/3-Request.md
index ffb76f56..a00d5a8e 100644
--- a/docs/3-Request-EN.md
+++ b/docs/en/3-Request.md
@@ -1,4 +1,4 @@
-[← Client](2-Client-EN.md) | Request[(中文)](3-Request-CN.md) | [Result →](4-Result-EN.md)
+[← Client](2-Client.md) | Request[(中文)](../zh/3-Request.md) | [Result →](4-Result.md)
 ***
 
 # Request
@@ -180,7 +180,7 @@ AlibabaCloud::rpc()
 
 
 ***
-[← Client](2-Client-EN.md) | Request[(中文)](3-Request-CN.md) | [Result →](4-Result-EN.md)
+[← Client](2-Client.md) | Request[(中文)](../zh/3-Request.md) | [Result →](4-Result.md)
 
 [SDK]: https://github.com/aliyun/openapi-sdk-php
 [guzzle-docs]: http://docs.guzzlephp.org/en/stable/request-options.html
diff --git a/docs/4-Result-EN.md b/docs/en/4-Result.md
similarity index 85%
rename from docs/4-Result-EN.md
rename to docs/en/4-Result.md
index cc44d371..1d81c01f 100644
--- a/docs/4-Result-EN.md
+++ b/docs/en/4-Result.md
@@ -1,4 +1,4 @@
-[← Request](3-Request-EN.md) | Result[(中文)](4-Result-CN.md) | [Region →](5-Region-EN.md)
+[← Request](3-Request.md) | Result[(中文)](../zh/4-Result.md) | [Region →](5-Region.md)
 ***
 
 # Result
@@ -52,4 +52,4 @@ $result->getRequest();
 ```
 
 ***
-[← Request](3-Request-EN.md) | Result[(中文)](4-Result-CN.md) | [Region →](5-Region-EN.md)
+[← Request](3-Request.md) | Result[(中文)](../zh/4-Result.md) | [Region →](5-Region.md)
diff --git a/docs/5-Region-EN.md b/docs/en/5-Region.md
similarity index 90%
rename from docs/5-Region-EN.md
rename to docs/en/5-Region.md
index ebf6f31d..1cecb888 100644
--- a/docs/5-Region-EN.md
+++ b/docs/en/5-Region.md
@@ -1,4 +1,4 @@
-[← Result](4-Result-EN.md) | Region[(中文)](5-Region-CN.md) | [Host →](6-Host-EN.md)
+[← Result](4-Result.md) | Region[(中文)](../zh/5-Region.md) | [Host →](6-Host.md)
 ***
 
 # Region
@@ -48,6 +48,6 @@ AlibabaCloud::getDefaultRegionId();
 ```
 
 ***
-[← Result](4-Result-EN.md) | Region[(中文)](5-Region-CN.md) | [Host →](6-Host-EN.md)
+[← Result](4-Result.md) | Region[(中文)](../zh/5-Region.md) | [Host →](6-Host.md)
 
 [regions]: https://www.alibabacloud.com/help/doc-detail/40654.html
diff --git a/docs/6-Host-EN.md b/docs/en/6-Host.md
similarity index 87%
rename from docs/6-Host-EN.md
rename to docs/en/6-Host.md
index 0820f51f..72503410 100644
--- a/docs/6-Host-EN.md
+++ b/docs/en/6-Host.md
@@ -1,4 +1,4 @@
-[← Region](5-Region-EN.md) | Host[(中文)](6-Host-CN.md) | [SSL Verify →](7-Verify-EN.md)
+[← Region](5-Region.md) | Host[(中文)](../zh/6-Host.md) | [SSL Verify →](7-Verify.md)
 ***
 
 # Host
@@ -35,6 +35,6 @@ AlibabaCloud::addHost('product', 'product.aliyuncs.com');
 ```
 
 ***
-[← Region](5-Region-EN.md) | Host[(中文)](6-Host-CN.md) | [SSL Verify →](7-Verify-EN.md)
+[← Region](5-Region.md) | Host[(中文)](../zh/6-Host.md) | [SSL Verify →](7-Verify.md)
 
 [endpoints]: https://developer.aliyun.com/endpoints
diff --git a/docs/7-Verify-EN.md b/docs/en/7-Verify.md
similarity index 90%
rename from docs/7-Verify-EN.md
rename to docs/en/7-Verify.md
index 58497f15..b9bc289e 100644
--- a/docs/7-Verify-EN.md
+++ b/docs/en/7-Verify.md
@@ -1,4 +1,4 @@
-[← Host](6-Host-EN.md) | SSL Verify[(中文)](7-Verify-CN.md) | [Debug →](8-Debug-EN.md)
+[← Host](6-Host.md) | SSL Verify[(中文)](../zh/7-Verify.md) | [Debug →](8-Debug.md)
 ***
 
 # SSL Verify
@@ -65,4 +65,4 @@ AlibabaCloud::accessKeyClient('foo', 'bar')
 
 
 ***
-[← Host](6-Host-EN.md) | SSL Verify[(中文)](7-Verify-CN.md) | [Debug →](8-Debug-EN.md)
+[← Host](6-Host.md) | SSL Verify[(中文)](../zh/7-Verify.md) | [Debug →](8-Debug.md)
diff --git a/docs/en/8-Debug.md b/docs/en/8-Debug.md
new file mode 100644
index 00000000..bbc89926
--- /dev/null
+++ b/docs/en/8-Debug.md
@@ -0,0 +1,8 @@
+[← SSL Verify](7-Verify.md) | Debug[(中文)](../zh/8-Debug.md) | [Log →](9-Log.md)
+***
+
+# Debugging
+If there is an environment variable `DEBUG=sdk` , all requests will enable debug mode.
+
+***
+[← SSL Verify](7-Verify.md) | Debug[(中文)](../zh/8-Debug.md) | [Log →](9-Log.md)
diff --git a/docs/9-Log-EN.md b/docs/en/9-Log.md
similarity index 92%
rename from docs/9-Log-EN.md
rename to docs/en/9-Log.md
index 22d29131..1d39e276 100644
--- a/docs/9-Log-EN.md
+++ b/docs/en/9-Log.md
@@ -1,4 +1,4 @@
-[← Debug](8-Debug-EN.md) | Log[(中文)](9-Log-CN.md) | [Test →](10-Test-EN.md)
+[← Debug](8-Debug.md) | Log[(中文)](../zh/9-Log.md) | [Test →](10-Test.md)
 ***
 
 # Log
@@ -68,4 +68,4 @@ The following variable substitutions are supported:
 | {start_time}     | Start Time |
 
 ***
-[← Debug](8-Debug-EN.md) | Log[(中文)](9-Log-CN.md) | [Test →](10-Test-EN.md)
+[← Debug](8-Debug.md) | Log[(中文)](../zh/9-Log.md) | [Test →](10-Test.md)
diff --git a/docs/0-Prerequisites-CN.md b/docs/zh/0-Prerequisites.md
similarity index 75%
rename from docs/0-Prerequisites-CN.md
rename to docs/zh/0-Prerequisites.md
index 2bb4a23e..356dc50e 100644
--- a/docs/0-Prerequisites-CN.md
+++ b/docs/zh/0-Prerequisites.md
@@ -1,4 +1,4 @@
-[← 首页](../README-CN.md) | 先决条件[(English)](0-Prerequisites-EN.md) | [安装 →](1-Installation-CN.md)
+[← 首页](../../README-CN.md) | 先决条件[(English)](../en/0-Prerequisites.md) | [安装 →](1-Installation.md)
 ***
 
 # 要求和建议
@@ -16,7 +16,7 @@
 - 生产环境中不要使用 [Xdebug][xdebug]
 
 ***
-[← 首页](../README-CN.md) | 先决条件[(English)](0-Prerequisites-EN.md) | [安装 →](1-Installation-CN.md)
+[← 首页](../../README-CN.md) | 先决条件[(English)](../en/0-Prerequisites.md) | [安装 →](1-Installation.md)
 
 [composer]: https://getcomposer.org
 [cURL]: http://php.net/manual/zh/book.curl.php
diff --git a/docs/1-Installation-CN.md b/docs/zh/1-Installation.md
similarity index 88%
rename from docs/1-Installation-CN.md
rename to docs/zh/1-Installation.md
index ccc5f063..426f7fce 100644
--- a/docs/1-Installation-CN.md
+++ b/docs/zh/1-Installation.md
@@ -1,4 +1,4 @@
-[← 先决条件](0-Prerequisites-CN.md) | 安装[(English)](1-Installation-EN.md) | [客户端 →](2-Client-CN.md)
+[← 先决条件](0-Prerequisites.md) | 安装[(English)](../en/1-Installation.md) | [客户端 →](2-Client.md)
 ***
 
 # 安装
@@ -7,7 +7,7 @@
 - [通过 Composer 安装依赖](#%E9%80%9A%E8%BF%87-composer-%E5%AE%89%E8%A3%85%E4%BE%9D%E8%B5%96)
 - [下载使用 ZIP 文件](#%E4%B8%8B%E8%BD%BD%E4%BD%BF%E7%94%A8-zip-%E6%96%87%E4%BB%B6)
 
-在安装之前，请确保您的环境使用的是 PHP 5.5 或更高版本。了解有关[环境要求和建议的更多信息](0-Prerequisites-CN.md)。
+在安装之前，请确保您的环境使用的是 PHP 5.5 或更高版本。了解有关[环境要求和建议的更多信息](0-Prerequisites.md)。
 
 ## 通过 Composer 安装依赖
 通过 Composer 安装是推荐方式。Composer 是一款 PHP 工具，用于管理和安装项目的依赖项。有关如何安装 Composer、配置自动加载并遵循定义依赖关系的其他最佳实践的更多信息，请参阅 [getcomposer.org](https://getcomposer.org)。
@@ -50,4 +50,4 @@ require __DIR__ . '/vendor/autoload.php';
 ```
 
 ***
-[← 先决条件](0-Prerequisites-CN.md)  | 安装[(English)](1-Installation-EN.md) | [客户端 →](2-Client-CN.md)
+[← 先决条件](0-Prerequisites.md)  | 安装[(English)](../en/1-Installation.md) | [客户端 →](2-Client.md)
diff --git a/docs/10-Test-CN.md b/docs/zh/10-Test.md
similarity index 86%
rename from docs/10-Test-CN.md
rename to docs/zh/10-Test.md
index 4a896af4..eb181df8 100644
--- a/docs/10-Test-CN.md
+++ b/docs/zh/10-Test.md
@@ -1,4 +1,4 @@
-[← 日志](9-Log-CN.md) | 测试[(English)](10-Test-EN.md) | [首页 →](../README-CN.md)
+[← 日志](9-Log.md) | 测试[(English)](../en/10-Test.md) | [首页 →](../../README-CN.md)
 ***
 
 # 测试
@@ -68,4 +68,4 @@ AlibabaCloud::cancelMock();
 
 
 ***
-[← 日志](9-Log-CN.md) | 测试[(English)](10-Test-EN.md) | [首页 →](../README-CN.md)
+[← 日志](9-Log.md) | 测试[(English)](../en/10-Test.md) | [首页 →](../../README-CN.md)
diff --git a/docs/2-Client-CN.md b/docs/zh/2-Client.md
similarity index 97%
rename from docs/2-Client-CN.md
rename to docs/zh/2-Client.md
index 33f6dbc1..5426e983 100644
--- a/docs/2-Client-CN.md
+++ b/docs/zh/2-Client.md
@@ -1,4 +1,4 @@
-[← 安装](1-Installation-CN.md) | 客户端[(English)](2-Client-EN.md) | [请求 →](3-Request-CN.md)
+[← 安装](1-Installation.md) | 客户端[(English)](../en/2-Client.md) | [请求 →](3-Request.md)
 ***
 
 # 客户端
@@ -212,7 +212,7 @@ AlibabaCloud::get('client1')->getSessionCredential();
 ```
 
 ***
-[← 安装](1-Installation-CN.md) | 客户端[(English)](2-Client-EN.md) | [请求 →](3-Request-CN.md)
+[← 安装](1-Installation.md) | 客户端[(English)](../en/2-Client.md) | [请求 →](3-Request.md)
 
 [ak]: https://usercenter.console.aliyun.com/#/manage/ak
 [ram]: https://ram.console.aliyun.com/users
diff --git a/docs/3-Request-CN.md b/docs/zh/3-Request.md
similarity index 97%
rename from docs/3-Request-CN.md
rename to docs/zh/3-Request.md
index eb9b329e..eb47b472 100644
--- a/docs/3-Request-CN.md
+++ b/docs/zh/3-Request.md
@@ -1,4 +1,4 @@
-[← 客户端](2-Client-CN.md) | 请求[(English)](3-Request-EN.md) | [结果 →](4-Result-CN.md)
+[← 客户端](2-Client.md) | 请求[(English)](../en/3-Request.md) | [结果 →](4-Result.md)
 ***
 
 # 请求
@@ -179,7 +179,7 @@ AlibabaCloud::rpc()
 ```
 
 ***
-[← 客户端](2-Client-CN.md) | 请求[(English)](3-Request-EN.md) | [结果 →](4-Result-CN.md)
+[← 客户端](2-Client.md) | 请求[(English)](../en/3-Request.md) | [结果 →](4-Result.md)
 
 [SDK]: https://github.com/aliyun/openapi-sdk-php/blob/master/README-CN.md
 [guzzle-docs]: https://guzzle-cn.readthedocs.io/zh_CN/latest/request-options.html
diff --git a/docs/4-Result-CN.md b/docs/zh/4-Result.md
similarity index 85%
rename from docs/4-Result-CN.md
rename to docs/zh/4-Result.md
index e4b1eb8a..fe90f8e2 100644
--- a/docs/4-Result-CN.md
+++ b/docs/zh/4-Result.md
@@ -1,4 +1,4 @@
-[← 请求](3-Request-CN.md) | 结果[(English)](4-Result-EN.md) | [区域 →](5-Region-CN.md)
+[← 请求](3-Request.md) | 结果[(English)](../en/4-Result.md) | [区域 →](5-Region.md)
 ***
 
 # 结果
@@ -52,4 +52,4 @@ $result->getRequest();
 ```
 
 ***
-[← 请求](3-Request-CN.md) | 结果[(English)](4-Result-EN.md) | [区域 →](5-Region-CN.md)
+[← 请求](3-Request.md) | 结果[(English)](../en/4-Result.md) | [区域 →](5-Region.md)
diff --git a/docs/5-Region-CN.md b/docs/zh/5-Region.md
similarity index 89%
rename from docs/5-Region-CN.md
rename to docs/zh/5-Region.md
index 082dbb46..e85714b8 100644
--- a/docs/5-Region-CN.md
+++ b/docs/zh/5-Region.md
@@ -1,4 +1,4 @@
-[← 结果](4-Result-CN.md) | 区域[(English)](5-Region-EN.md) | [域名 →](6-Host-CN.md)
+[← 结果](4-Result.md) | 区域[(English)](../en/5-Region.md) | [域名 →](6-Host.md)
 ***
 
 # 区域
@@ -48,6 +48,6 @@ AlibabaCloud::getDefaultRegionId();
 ```
 
 ***
-[← 结果](4-Result-CN.md) | 区域[(English)](5-Region-EN.md) | [域名 →](6-Host-CN.md)
+[← 结果](4-Result.md) | 区域[(English)](../en/5-Region.md) | [域名 →](6-Host.md)
 
 [regions]: https://help.aliyun.com/document_detail/40654.html
diff --git a/docs/6-Host-CN.md b/docs/zh/6-Host.md
similarity index 86%
rename from docs/6-Host-CN.md
rename to docs/zh/6-Host.md
index b195e92a..9ecd7cb6 100644
--- a/docs/6-Host-CN.md
+++ b/docs/zh/6-Host.md
@@ -1,4 +1,4 @@
-[← 区域](5-Region-CN.md) | 域名[(English)](6-Host-EN.md) | [SSL 验证 →](7-Verify-CN.md)
+[← 区域](5-Region.md) | 域名[(English)](../en/6-Host.md) | [SSL 验证 →](7-Verify.md)
 ***
 
 # 域名
@@ -36,6 +36,6 @@ AlibabaCloud::addHost('product', 'product.aliyuncs.com');
 ```
 
 ***
-[← 区域](5-Region-CN.md) | 域名[(English)](6-Host-EN.md) | [SSL 验证 →](7-Verify-CN.md)
+[← 区域](5-Region.md) | 域名[(English)](../en/6-Host.md) | [SSL 验证 →](7-Verify.md)
 
 [endpoints]: https://developer.aliyun.com/endpoints
diff --git a/docs/7-Verify-CN.md b/docs/zh/7-Verify.md
similarity index 89%
rename from docs/7-Verify-CN.md
rename to docs/zh/7-Verify.md
index b5ade82d..18965efa 100644
--- a/docs/7-Verify-CN.md
+++ b/docs/zh/7-Verify.md
@@ -1,4 +1,4 @@
-[← 域名](6-Host-CN.md) | SSL 验证[(English)](7-Verify-EN.md) | [调试 →](8-Debug-CN.md)
+[← 域名](6-Host.md) | SSL 验证[(English)](../en/7-Verify.md) | [调试 →](8-Debug.md)
 ***
 
 # SSL 验证
@@ -64,4 +64,4 @@ AlibabaCloud::accessKeyClient('foo', 'bar')
 
 
 ***
-[← 域名](6-Host-CN.md) | SSL 验证[(English)](7-Verify-EN.md) | [调试 →](8-Debug-CN.md)
+[← 域名](6-Host.md) | SSL 验证[(English)](../en/7-Verify.md) | [调试 →](8-Debug.md)
diff --git a/docs/zh/8-Debug.md b/docs/zh/8-Debug.md
new file mode 100644
index 00000000..898f6d61
--- /dev/null
+++ b/docs/zh/8-Debug.md
@@ -0,0 +1,8 @@
+[← SSL 验证](7-Verify.md) | 调试[(English)](../en/8-Debug.md) | [日志 →](9-Log.md)
+***
+
+# 调试
+如果存在环境变量 `DEBUG=sdk` ，所有请求将启用调试输出。
+
+***
+[← SSL 验证](7-Verify.md) | 调试[(English)](../en/8-Debug.md) | [日志 →](9-Log.md)
diff --git a/docs/9-Log-CN.md b/docs/zh/9-Log.md
similarity index 91%
rename from docs/9-Log-CN.md
rename to docs/zh/9-Log.md
index cc5e4aac..11af4fb7 100644
--- a/docs/9-Log-CN.md
+++ b/docs/zh/9-Log.md
@@ -1,4 +1,4 @@
-[← 调试](8-Debug-CN.md) | 日志[(English)](9-Log-EN.md) | [测试 →](10-Test-CN.md)
+[← 调试](8-Debug.md) | 日志[(English)](../en/9-Log.md) | [测试 →](10-Test.md)
 ***
 
 # 日志
@@ -68,4 +68,4 @@ AlibabaCloud::setLogFormat('{hostname} [{date_common_log}]');
 | {start_time}     | 开始时间 |
 
 ***
-[← 调试](8-Debug-CN.md) | 日志[(English)](9-Log-EN.md) | [测试 →](10-Test-CN.md)
+[← 调试](8-Debug.md) | 日志[(English)](../en/9-Log.md) | [测试 →](10-Test.md)
diff --git a/src/AlibabaCloud.php b/src/AlibabaCloud.php
index 2b33498e..f6ac9a2a 100644
--- a/src/AlibabaCloud.php
+++ b/src/AlibabaCloud.php
@@ -55,7 +55,7 @@ public static function __callStatic($product, $arguments)
         throw new ClientException(
             "May not yet support product $product quick access, "
             . 'you can use [Alibaba Cloud Client for PHP] to send any custom '
-            . 'requests: https://github.com/aliyun/openapi-sdk-php-client/blob/master/docs/3-Request-EN.md',
+            . 'requests: https://github.com/aliyun/openapi-sdk-php-client/blob/master/docs/en/3-Request.md',
             SDK::SERVICE_NOT_FOUND
         );
     }