A document signed with Taiwan instead of POC I would add.

Control was taken from China in the first place.

Which china? If the world was truly fair and honored the original signatories, it'd have gone back to the ROC and not the PRC. But it didn't because of might is right.

I saw you made a comment earlier that both countries say "China" on their passports missing the point of this whole conflict.

I think you should spend at least an hour reading about the history of this conflict (not through China's censored Internet).