I think China is looking to make a gold backed yuan. This could also become the world's next global reserve currency, like the USD is now.
They got a bunch of gold over the past decade, that idea is plausible.
This can also be a reason for them to cut ways to get yuan exchanged for BTC.

http://www.zerohedge.com/contributed/2012-21-22/will-china-make-yuan-gold-backed-currency