Not for long china can controlling bitcoin price, im sure now they on trouble due their efforts to make the price under $ 1000 always can not last long and now all trader are smart they not easy get in on the trap.
Honestly I used to believe that China is trying to control the price when Bitcoin price go up more than $1000 but the last two press release of PBOC does not mean that they are or in a position of wanting to control Bitcoin price. They are just after the implementation of the law regarding money laundering and possible support to the terrorist activities. There is no way in their announcement that they are banning or want to control bitcoin price. they are just preparing their exchanges for a more legal way of implementing rules on the transactions of Bitcoin.
i think now china cannot manipulate the price of bitcoin. may be in past they were responsible for that bit i think now they are not responsible for that but now it is one of the most difficult job to do so.