one country's constitution doesnt get to decide the sovereignty of other nations. And that's what you've shown me, plus an unrelated vote in the UN. Neither of these preclude Taiwan as a country. And ignoring the part about what the people within the territory of Taiwan want just confirms for me the inhuman view your circle has of people.
It's not just the PRC's constitution though, it was decided by UNGAR 2758 that the People's Republic of China represents "China", which includes the Taiwan Province inside it's territory.
really weird strategy coming into a discussion with someone who believes in Taiwan sovereignty, and just expect Taiwan being a part of China as a given I'll just accept