What about Btc-e?
They can sell them for CNH. Of course is not the same than CNY, but they can keep trading with their currency.
But can they withdraw the CNH from BTC-e to their mainland bank account? They can sell them for CNH. Of course is not the same than CNY, but they can keep trading with their currency.
The secondary problem is,
form China will comes a lot new bitcoins to Bitstamp and BTC-e and it will crash the price.
Just check fake Huobi volumes !
FTFY
Would tend to agree with your change there. Even if the trade volumes are not fake, they're not representative: there are no trading fees. The same coins can be flipped back and forth.