I ever watched one of china exchanges.
they said government just banned the trade exchanges for digital to their fiat currency, BTCCNY.
so, after that, they released digital to more international fiat currency trade exchanges, BTCUSD.
until now, the market is fine and most of chinese traders or investors seem comeback.
or you can try overseas market.
that's the best way to trade

now many exchanges have reopen their exchange outside the china and support coin-coin trade!
but it is still difficlut to exchange coins to Chinese Yuan!
there are some OTC groups but by this way is not safe enough and u don't know the funds from where !