Reunification yes. But not by military.
That's the official position now, but the Chinese don't rule out using force either. Their vice foreign minister said in April, "National reunification of China is a historical process and the tide of history. It will not be stopped by anyone or any force. We will never let Taiwan go independent. We are firmly committed to safeguarding national sovereignty and security and promoting national reunification. We are prepared to do everything we can for peaceful reunification. That said, we don't pledge to give up other options. No option is excluded."
Taiwan is just an island, with a population china never needs. A land china has in abundance. No natural resources that they need. It's just a symbolic long lost brother and sentimentality. What taiwan offers economically dwarfed by one of their big cities.
A minute ago, you were arguing the level of trade between the two made Taiwan too valuable to invade, so you kind of need to make your mind up on that. China's goals aren't economic, they are nationalist, and we all know how dangerous that kind of sentimentality can be. And Hong Kong and the Uyghurs prove that populations that don't fall into line, will be coerced by force if necessary.
The china taiwan threat is made by the US to force taiwan to buy their obsolete military gear, and to become a thorn in china side.
That must be why china keeps
invading Taiwanese airspace,
talks about 'war' in the context of Taiwanese independence and is building
new amphibious ships.
Like it or hate it the american hegemony is threatened by the rise of china and they'll do anything to stop it. By hook or by crook. And the world will bear the cost again ecomically if the 2 giant comes to a war. China's biggest threat is not military, the US can deal with that and every other nation attacked by china in conventional ways would play right into the US hand and will become an excuse for a real war. As much as china has developed the last century a war with US is a war they can't win.
I'm not sure what you mean by China not being able to win a war against the US given the Taliban just did - they might well conclude there are a range of strategic options that would extract a sufficient price or deter US involvement short of a full war anyway, given the advantage China has of proximity. There's a lot of potential moves available to them in an escalating campaign in their own backyard, should they wish to take them, risky ones of course. But China might well conclude they are worth taking if they could push the US back into the Pacific.
That's why this is all so destabilising, it puts an increasingly isolated looking US under pressure to look stronger than they are and it gives confidence to Chinese opportunists that the US is weaker than they might be.