If you know Chinese language, please see the book <The Korean War> written by US Army general Matthew Ridgway.
The Chinese edition: http://www.cj888.com/book/jun/korean/index.html

Also, you can see Chinese books about Korean War, but you must know Chinese language.
《Far East Korean War 》 written by Wang Shuzeng : http://www.oash.com/read/military/y/ydcs/
，《Hanjiang Blood》written by Ye Yumeng: http://www.bookhome.net/lishi/other/hjx/
《Black Snow》written by Ye Yumeng: http://www.bookhome.net/lishi/junshi/heixue/


In addition, last year the Russian made the former USSR’s archives about Korean War open, through which you can know something interesting!!

Of course the Chinese were involved! Korea borders C on the south. North Korea and C were both Communist and Russia was the main supplier of weaponry to both countries.

...This is getting rediculous! All I see is the letter C for C .