diff --git a/README-CN.md b/README-CN.md
index 69fe5ee5bf..b5bd0061d1 100644
--- a/README-CN.md
+++ b/README-CN.md
@@ -105,7 +105,7 @@ public class Main {
 ## 文档
 * [环境要求](./docs/0-Requirements-CN.md)
 * [安装](./docs/1-Installation-CN.md)
-* [客户端](./docs/2-Client-CN.md)
+* [客户端与凭证](./docs/2-Client-CN.md)
 * [连接池](./docs/3-Pool-CN.md)
 * [超时机制](./docs/4-Timeout-CN.md)
 * [HTTPS配置](./docs/5-HTTPS-CN.md)
diff --git a/README.md b/README.md
index 7c7351f8d7..57dcea80c7 100755
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ public class Main {
 ## Documentation
 * [Requirements](./docs/0-Requirements-EN.md)
 * [Installation](./docs/1-Installation-EN.md)
-* [Client](./docs/2-Client-EN.md)
+* [Client & Credentials](./docs/2-Client-EN.md)
 * [Connection Pool](./docs/3-Pool-EN.md)
 * [Timeout](./docs/4-Timeout-EN.md)
 * [HTTPS Configurations](./docs/5-HTTPS-EN.md)
diff --git a/docs/1-Installation-CN.md b/docs/1-Installation-CN.md
index 14fb259e6d..ebaa6d03ae 100644
--- a/docs/1-Installation-CN.md
+++ b/docs/1-Installation-CN.md
@@ -1,4 +1,4 @@
-[← 环境要求](0-Requirements-CN.md) | 安装[(English)](1-Installation-EN.md) | [客户端 →](2-Client-CN.md)
+[← 环境要求](0-Requirements-CN.md) | 安装[(English)](1-Installation-EN.md) | [客户端与凭证 →](2-Client-CN.md)
 ***
 
 无论您要使用哪个产品的开发工具包，都必须安装`aliyun-java-sdk-core`。比如，对云服务器SDK的调用，您需要安装`aliyun-java-sdk-core`和`aliyun-java-sdk-ecs`。
@@ -27,4 +27,4 @@
 </dependency>
 ```
 ***
-[← 环境要求](0-Requirements-CN.md)  | 安装[(English)](1-Installation-EN.md) | [客户端 →](2-Client-CN.md)
\ No newline at end of file
+[← 环境要求](0-Requirements-CN.md)  | 安装[(English)](1-Installation-EN.md) | [客户端与凭证 →](2-Client-CN.md)
\ No newline at end of file
diff --git a/docs/1-Installation-EN.md b/docs/1-Installation-EN.md
index d7c6573166..1ef5bfaa23 100644
--- a/docs/1-Installation-EN.md
+++ b/docs/1-Installation-EN.md
@@ -1,4 +1,4 @@
-[← Requirements](0-Requirements-EN.md) | Installation[(中文)](1-Installation-CN.md) | [Client →](2-Client-EN.md)
+[← Requirements](0-Requirements-EN.md) | Installation[(中文)](1-Installation-CN.md) | [Client & Credentials →](2-Client-EN.md)
 ***
 
 If you use Apache Maven to manage Java projects, you only need to add corresponding dependencies to the `pom.xml` files of the projects. You can download the Maven dependencies of different cloud products in [Alibaba Cloud developer resources](https://help.aliyun.com/learn/developer.html).
@@ -29,4 +29,4 @@ If maven is not downloading jar packages from a central repository, you need to
 ```
 
 ***
-[← Requirements](0-Requirements-EN.md) | Installation[(中文)](1-Installation-CN.md) | [Client →](2-Client-EN.md)
\ No newline at end of file
+[← Requirements](0-Requirements-EN.md) | Installation[(中文)](1-Installation-CN.md) | [Client & Credentials →](2-Client-EN.md)
\ No newline at end of file
diff --git a/docs/2-Client-CN.md b/docs/2-Client-CN.md
index ec45179a54..8914888cdb 100644
--- a/docs/2-Client-CN.md
+++ b/docs/2-Client-CN.md
@@ -1,4 +1,4 @@
-[← 安装](1-Installation-CN.md) | 客户端[(English)](2-Client-EN.md) | [连接池 →](3-Pool-CN.md)
+[← 安装](1-Installation-CN.md) | 客户端与凭证[(English)](2-Client-EN.md) | [连接池 →](3-Pool-CN.md)
 ***
 
 ### 使用 AccessKey 调用
@@ -149,4 +149,4 @@ public class Main {
 ```
 
 ***
-[← 安装](1-Installation-CN.md) | 客户端[(English)](2-Client-EN.md) | [连接池 →](3-Pool-CN.md)
+[← 安装](1-Installation-CN.md) | 客户端与凭证[(English)](2-Client-EN.md) | [连接池 →](3-Pool-CN.md)
diff --git a/docs/2-Client-EN.md b/docs/2-Client-EN.md
index a0de162da6..c21ab8d322 100644
--- a/docs/2-Client-EN.md
+++ b/docs/2-Client-EN.md
@@ -1,4 +1,4 @@
-[← Installation](1-Installation-EN.md) | Client[(中文)](2-Client-CN.md) | [Connection Pool →](3-Pool-EN.md)
+[← Installation](1-Installation-EN.md) | Client & Credentials[(中文)](2-Client-CN.md) | [Connection Pool →](3-Pool-EN.md)
 ***
 
 ### Using AccessKey call
@@ -151,4 +151,4 @@ public class Main {
 ```
 
 ***
-[← Installation](1-Installation-EN.md) | Client[(中文)](2-Client-CN.md) | [Connection Pool →](3-Pool-EN.md)
\ No newline at end of file
+[← Installation](1-Installation-EN.md) | Client & Credentials[(中文)](2-Client-CN.md) | [Connection Pool →](3-Pool-EN.md)
\ No newline at end of file
diff --git a/docs/3-Pool-CN.md b/docs/3-Pool-CN.md
index 85325e7752..490c14cf5f 100644
--- a/docs/3-Pool-CN.md
+++ b/docs/3-Pool-CN.md
@@ -1,4 +1,4 @@
-[← 客户端](2-Client-CN.md) | 连接池[(English)](3-Pool-EN.md) | [超时机制 →](4-Timeout-CN.md)
+[← 客户端与凭证](2-Client-CN.md) | 连接池[(English)](3-Pool-EN.md) | [超时机制 →](4-Timeout-CN.md)
 ***
 
 ## 配置连接池
@@ -22,4 +22,4 @@ IAcsClient client = new DefaultAcsClient(profile);
 ```
 
 ***
-[← 客户端](2-Client-CN.md) | 连接池[(English)](3-Pool-EN.md) | [超时机制 →](4-Timeout-CN.md)
\ No newline at end of file
+[← 客户端与凭证](2-Client-CN.md) | 连接池[(English)](3-Pool-EN.md) | [超时机制 →](4-Timeout-CN.md)
\ No newline at end of file
diff --git a/docs/3-Pool-EN.md b/docs/3-Pool-EN.md
index f5dfce943d..5e6436bc44 100644
--- a/docs/3-Pool-EN.md
+++ b/docs/3-Pool-EN.md
@@ -1,4 +1,4 @@
-[← Client](2-Client-EN.md) | Connection Pool[(中文)](3-Pool-CN.md) | [Timeout →](4-Timeout-EN.md)
+[← Client & Credentials](2-Client-EN.md) | Connection Pool[(中文)](3-Pool-CN.md) | [Timeout →](4-Timeout-EN.md)
 ***
 
 ## Configure the connection pool
@@ -22,5 +22,5 @@ IAcsClient client = new DefaultAcsClient(profile);
 ```
 
 ***
-[← Client](2-Client-EN.md) | Connection Pool[(中文)](3-Pool-CN.md) | [Timeout →](4-Timeout-EN.md)
+[← Client & Credentials](2-Client-EN.md) | Connection Pool[(中文)](3-Pool-CN.md) | [Timeout →](4-Timeout-EN.md)