For anyone who think that China is controlling bitcoin and they use this power to bring bitcoin down - think twice about it.
China is mining super power but that mining power without node control is not that important, and China has only like 150 nodes.
Secondly - mining is business, if Chinese miners do something irrational or dodgy price of bitcoin will immediately crash.
Who will lose the most money then? Chinese miners.
Looks to me, you are getting it all mixed up! Now if as you said, China has dummy control over bitcoin, why would something irrational or dodgy by Chinese miners immediately precede a crash in price of bitcoin? That is invariably ascribing to them, the power you professed they do not have. Actually, what China may not have is the absolute control over bitcoin, which of course is good news to all, but as is, they are in a position to jostle the bitcoin market from time to time.