Go ahead an look up the column of military transports entering Hong Kong during the ahead-of-schedule "reunification" that apparently wasn't an invasion.
I'm well aware of what happened in quite some detail. As I said I'm not saying I agree with what happened, but it's still not an invasion. You'd at most be stopping an internal riot / protest if that's what it is.
That's like saying if the military moved between Texas and California is that an invasion? Even if you count the whole thing as a civil war that's still not an invasion. Hong Kong returned to China in 1997. Too late to be complaining in 2025.