HK is [part of China. I just hope the US government doesn't go to war over it, or accept hong kong folks are, god forbid, refugees. If I was scared in hong kong and wanted to get out of dodge, Taiwan is my best chance. The uber wealthy in HK, the type's whose daughters buy 17,000 dollar purses, will have no problems relocating.
lets just say HK'ers have a a few choices
1- leave (go to Taiwan, more cultural fit)
2- stay and accept PRC rule as PRC see fit
3- stay and fight
4- the wealthy takes their money and runs, as they always do
finally I dont want US blood spilled for what is essentially a city that is part of China.
The UN is OWNED by china so expect nothing out of the UN but support of China. Also as another anon has stated HK was always part of China, there was a lease agreement, but that Agreement was made with the Govt of Taiwan, not Mao's PRC.