What?
China has a one country two system policy. It coexists with democracy in HK and in Taiwan.
For Chinese leaders have able to accomodate with reality and after the collapse of the Soviet Union, China has warm relations with post-Communist Russia.
China should be able to get along with a unified democratic Korea when it happens.
They'd invade Taiwan if they could get away with it.
And there is a weird double visa policy keeping Hong Kong Chinese and mainland Chinese separated.