> China doesn't want Taiwan for TSMC. They want Taiwan because they see them as a rebellious province. In their mind, the Chinese civil war never ended and that island is the last bastion of the Kuomintang. One way I've heard it described in a way that is easier for Americans to understand is; Imagine at the end of the American Civil War, a confederate army retreated to an island like Cuba or Hawaii, they took it over and have been calling themselves the real America ever since.
We know this version is closer to the truth because Mao tried to take Taiwan
We know this version is closer to the truth because Mao tried to take Taiwan