OK, the "what" seems to be that this is a subscale representation of
the Aksai Chin region. The long east-west lake in the middle is
Pangong Lake, real-world coordinates 33.75 N , 79.09 E .

See

http://www.cifjkindia.org/legal_docs...docs_007.shtml
http://en.wikipedia.org/wiki/Aksai_Chin .

Now as to the "why", one can only speculate...