I think China just playing with us, make a panic sell to buy more at low prices. I don't care about them and still trade, if BTC get dropped i will buy, that's it.
Most likely so, they make trouble with the price of coins in the down market, then they start buying coins, and start making a positive issue to keep prices up again, then they sell it back for a profit. We must follow the flow and certainly not too quickly panicked in the face of all issues.