Chinese exchanges still have the biggest volumes, China is still the biggest BTC market
No they dont.
No its not.

Thats the latest extrapolation after PBoC forced chinese exchanges to drop their pants down.
Come on - this chart lumps all USD exchanges together. Today OKCoin has had so far 20K volume - which exchange had more? Maybe the Japanese ones - but those are again zero-fees unreliable data. The same thing with the market share - CNY is pretty much only used in China - USD is used in all national markets.