A century old treaty signed at gunpoint can be dissolved at gunpoint.
It’s also unclear why Taiwan should be “recovered” at all, they were two factions of the cultural revolution sure, but that doesn’t mean they should be unified now any more than the UK should “recover” America.
we can of course disagree with china. but ignoring what they want is...i don't know...naive?
Infact all other concessions except HK and Macau were returned to Chinese about the end of the war.
If one day situation permits it, Canada will become 5X US state.
The laws of man, including international law, treaties and borders, are made up and can be change with enough will or force.
Not century old. And not at gunpoint.
[0] https://en.wikipedia.org/wiki/Sino-British_Joint_Declaration