I see two possible scenarios.
The first is that the OP is correct and the market is being manipulated down via rumours so the chinese can buy up big. They're very smart when it comes to this sort of thing, and play the long game, so I wouldn't put this in the realm of impossiblity.
The second is that the OP is incorrect and they genuinely believe they want to remain in control and protect their national currency. In this scenario, prices return to pre-china (ish) levels, and the rest of the world continues to approve of bitcoins (eg germany), and continue buying and using them, until a point where china has no choice but to realize they made a mistake.
When you said "the chinese" you meant the government and not its ppl did you?
Because.....it wouldnt make any sense other wise.
The CCP only cares about its State and not its ppl ....