Refernces on this article 

Today I fixed two broken ref links on this article, however one other ref link appears to be broken and I am unable to source the new page for that content. See  reference 6. "项目介绍 (Topic Overview)" (in Chinese). Centre of China's Borderland History and Geography Research, CASS. 2007-07-04. Retrieved 2009-07-28.

In addition, several references point to Korea or Chinese language websites without translation. As per WP:NONENG an English translation of the relevant section of the source should be included in the reference.