Many great things are banned, censored or restricted in China. If China wants to shut down mining activities, miners will go somewhere else and it is a good thing for Bitcoin.

Just to name a few:

Google

Youtube

Facebook

Wikipedia

Reddit

Netflix

Instagram

Whatsapp

Skype

Quora

Winnie the Pooh

Alice in Wonderland

Even though these things are banned in China, they are thriving in the rest of the world.

If China wants to crackdown Bitcoin mining activities, miners will go elsewhere. This is actually a good thing for cryptocurrencies, as it shouldn’t be under a decentralised, power-obsessed regime. China can play with its digital yuan.