diff --git a/README.md b/README.md
index f95364a..c058a43 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ If you are using this code, please cite:
 
      
 ## Update log / 日志
-Before version 2.1, function building
+Before version 2.0, function building
 
 Bgolearn V2.1.1 Jun 9, 2023. *para noise_std* By default, the built-in Gaussian process model estimates the noise of the input dataset by maximum likelihood, and yields in a more robust model.
 
@@ -78,7 +78,7 @@ See : [papers](https://github.com/Bin-Cao/Bgolearn/tree/main/Refs)
 
 ## About / 更多
 Maintained by Bin Cao. Please feel free to open issues in the Github or contact Bin Cao
-(bcao@shu.edu.cn) in case of any problems/comments/suggestions in using the code. 
+(bcao686@connect.hkust-gz.edu.cn) in case of any problems/comments/suggestions in using the code. 
 
 ## Contributing / 共建
 Contribution and suggestions are always welcome. In addition, we are also looking for research collaborations. You can submit issues for suggestions, questions, bugs, and feature requests, or submit pull requests to contribute directly. You can also contact the authors for research collaboration.