

Not quite. Hong Kong is a devolved democracy, the PLA has already occupied since 1997 when the british handed it over.
This is more like the US sending troops to Los Angleas.
The PLA does not occupy Taiwan. They don’t even occupy Kinmen Islands that’s very close to Mainland China (not sure why they still haven’t taken it). They’ll need to send troops to even control it in any way, where as in Hong Kong, they are already there.
Hong Kong about to become “Xianggang” (香港 in pinyin)