Earlier quoted context omitted.
China is strong and the UK is weak. The treaty is not valid anymore. Only an idiot would say otherwise.
The terms of the treaty state anything about the relative strength of each nation?
The Chinese had no obligation to sign the 1980s treaty to get HK back, and were hardly intimidated by the UK’s 1980s military might to do so (I mean an British admiral said about the Falkland war: “if not for a few defective fuses we would have lost”. Against Argentina. Pretty pathetic)
The UK was delusionaly saying it might not give HK back to commies (understandable sentiment, surely) and the commies signed something to let the Brits save face.
About HK:
There’s nothing we can do.
Deluding ourselves that there is weakens us
We must contain the CCP, but HK is not it.