Update README.md

cn link change to io.

Author: FengShang

README.md

@@ -10,15 +10,12 @@ SDK is designed primarily for use in multi-user systems such as web servers and
 
 ## Basic Terms
 
-Reading the short [Basic Terms](https://github.com/FeatureProbe/FeatureProbe/blob/main/BASIC_TERMS.md) will help to understand the code blow more easily.  [中文](https://github.com/FeatureProbe/FeatureProbe/blob/main/BASIC_TERMS_CN.md)
+Reading the short [Introduction](https://docs.featureprobe.io/sdk/sdk-introduction) will help to understand the code blow more easily.  [中文](https://docs.featureprobe.io/zh-CN/sdk/sdk-introduction)
 
-## Core Data Structures
-
-Reading the short [Doc](https://github.com/FeatureProbe/feature-probe-docs/blob/b8c55a35c771e4223469f1b121f8b78ab3d9bc22/docs/sdk/sdk-introduction.md?plain=1#L13-L34) about core data sturtures. [中文](https://github.com/FeatureProbe/feature-probe-docs/blob/b8c55a35c771e4223469f1b121f8b78ab3d9bc22/i18n/zh-CN/docusaurus-plugin-content-docs/current/sdk/sdk-introduction.md?plain=1#L14-L35)
 
 ## How to Use This SDK
 
-See [SDK Doc](https://docs.featureprobe.io/sdk/Server-Side%20SDKs/java-sdk) for detail.
+See [SDK Doc](https://docs.featureprobe.io/sdk/Server-Side%20SDKs/java-sdk) for detail.[中文](https://docs.featureprobe.io/zh-CN/sdk/Server-Side%20SDKs/java-sdk)
 
 ## Contributing