This is FUD. There is competition between miners and even if some miners for whatever reason don't want to include certain transactions (and how would they even know which transactions they want to exclude?), other miners will, because there are transaction fees to be earned.
China is a one party communist state. When the party says that somebody has to do something in regards to national security, it gets done. Otherwise it's time for prison or death and somebody else does it anyways. That's has been China's MO since Mao. No mining incentive beats men with guns.
This is the case for all decentralized crypto currencies. If you don't know who's appending the chain and thus creating currency and/or including transactions, you cannot be sure it isn't your enemy.