http://my.oschina.net/u/1436933/blog/193019
http://blog.youkuaiyun.com/mutouyueliang/article/details/6215811
http://www.16rd.com/thread-9888-1-1.html
http://blog.youkuaiyun.com/zhaohc_nj/article/details/6427096
http://bbs.youkuaiyun.com/topics/390255498?page=1#post-394566403