No offense to the Chinese, but I doubt anyone would do anything about cryptocurrency fraud in that country. With the counterfeit crapola being pumped out of there, I'm dead sure no one's interested in shitcoin dynamics on the exchanges.
huobi and okcoin.
https://bitcoinity.org/markets/list?currency=ALL
https://data.bitcoinity.org/markets/volume/30d?c=e&t=a
as you can see from the above links, both of those exchanges have more than 40% of the total volume of all exchanges.
they're not the only exchanges in china. the other chinese exchanges also have high volumes. but are still normal considering the amount of bitcoin miners in china. those two are just unreal.