Added link of HOWTO-zh.md . **This file is in PR right now, please consider it
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+Read this in other languages:[中文](HOWTO-zh.md)
+
Welcome to Free-Programming-Books! We welcome new contributors; even those making their very first pull request on Github. If you're one of those, here are some resources that might help:
* [About Pull Requests](https://help.github.com/articles/about-pull-requests/)