Bitcoin users in China are of no added value to Bitcoin as they don't really contribute to anything. Such a massive country with more than 1.3 billion citizens, and the number of nodes there is just peanuts. Chinese are mostly only interested in Bitcoin as investment rather than actual usage of Bitcoin as tool. Also, now the PBOC has put serious regulations to work, it shows that the exchanges there are in fact not bigger than western exchanges. What does China at this point still have? Cheap electricity that attracts investors from all around the world to set up massive farms there. Take cheap electricity away, and bemmm, gone is China.