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 A mind mapping chart to record the things that I learned.
 
-The File format is in [X-mind](http://www.xmind.net/)
+The File format is in [MindNode](https://mindnode.com/)
 
 ## Preview
 
-![my knowledge mind mapping image](./Knowledge.png)
\ No newline at end of file
+![my knowledge mind mapping image](./Knowledge.png)