Update README.md

Author: aidlearning

README.md

@@ -20,8 +20,7 @@ It has a unique cpu+gpu acceleration technology, that brings a significant boost
 
 <img src="http://www.aidlearning.net/showdoc/server/index.php?s=/api/attachment/visitFile/sign/4a72d62cec051582170e99b3584da67c&showdoc=.jpg" width="960" />
 
-<img src="http://www.aidlearning.net/5f353db821b5c.png"  width="960" />
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+<img src="http://www.aidlearning.net/showdoc/server/index.php?s=/api/attachment/visitFile/sign/846b7bfbf009ef144372943dc251c848&showdoc=.jpg"  width="960" />
 
 ## Usage
 The lastest version of release is in the link below (About 20MB):