Could it be that China Government gave strikt order to Chinese Mining Company, only to sell BTC on Binance. Because of the Binance Hack Trader (but not the Chinese Miner) switched from Binance to other exchanges, but because of the China Government Order the Chinese Mining BTC are absent on the other exchanges, that disturbed Ask&Demand is the reason of the last BTC pump?
The recent BTC price pump started way before the Binance hack and I don't think that China has such a big influence over the bitcoin price anymore.Their big influence was back in 2016-2017.
Anyway,you are talking about rumors that can't be verified and I don't believe that the Chinese government cares that much about Bitcoin.