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README.md

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 A Chinese characters recognition repository based on convolutional recurrent networks. (**Below please scan the QR code to join the wechat group.**)
 
 <p align='center'>
-<img src='images/wechat.png' title='example' style='max-width:100px' width=150 height=150></img>
+<img src='images/wechat.jpeg' title='example' style='max-width:100px' width=150 height=150></img>
 </p>
 
 ## Performance