I've never actually withdrawn from Gox, but it doesn't seem like selling on Gox and withdrawing funds would land in their bank account faster than an international wire. Maybe I'm wrong on that. [/list][/list]
I don't think btcchina provide such kind of liquidity for millions of RMB, in the last 30 days it only exchanged 2.9 million RMB.
http://bitcoincharts.com/markets/btcnCNY.htmlThey may have other ways of bitcoin exchange plans, or the suppliers accept bitcoins.