Some of what you're describing has already come to pass with Hong Kong. China is applying the squeeze to Hong Kong that skirts the bounds of definition of the agreement as part of the British handover, ie. one country, two systems[1].

It's fairly easy to see China's future actions with any expanded territories that the rest of the world may allow with eyes downcast.

[1]:https://en.m.wikipedia.org/wiki/One_country,_two_systems