They landed there and station it there permanently to claim the territory Liao ,100km radius now belongs the red land !!!
You are quite correct.
It is partly about staking a claim.
Presently technology and cost barriers prevent other countries besides USSR (unmanned), USA (manned) and China (unmanned) from lunar landing.
When more countries can do so, they will start to quarrel over who has "rights" to which part of the moon.
http://www.volokh.com/2013/12/17/property-rights-moon/

Next, China will be building a Battle Star Galactica or a USS Enterprise.
