So you agree it would be a deal so good that the Taiwan could not turn it down? Many in the intel committee concur the real reason why US doesn't actually want Taiwan independence is not because it would cross any CCP 'red lines' but because America is using Taiwan as a pawn to hedge its bets. In that if one day the CCP fell from grace and China (mainland) collapsed, it would immediately install Taiwan as the puppet government of all of China. By Taiwan going independent, it prevents anything like that from happening.
One strategic point of contention has always been Taiwan blocks China's access to the sea since it is a vassal of the USA. But Xi's BRI will make this much less of an issue. Once BRI is built, the days of naval blockades of economically cripple China /trade will be a thing of the past. Just like aircraft cariers are getting increasingly useless and becoming symbolic power projections when in the era of kinetic kill and hypersonic missiles.
By "giving up" Taiwan it takes a lot of pressure off Beijing's plate, and at the same time it prevents the US from using Taiwan as a constant thorn in Beijings side. If this trade/deal allows China to instantly overnight catch up to the rest of the world in terms of chip manufacturing then long term it could be a good strategic move for China. It is all about moving up the tech value chain, the first to AI dominance will win forever. There is no second place.
I would recommend you stop this track of argument before you inflame things further.
You might be new to Chinese historical, cultural, and strategic rationale, or you may be not. But I want to put this simply: the idea of "giving up" Taiwan for something like TSMC is simply ludicrous.
There are obviously strategic reasons for why China will not give up on its desire to reunify with Taiwan. But perhaps the core reason is because of Chinese history and the desire to correct the aberration of history which China today perceives and to seek justice and correction of the various territorial, security, economic and sovereign losses China experienced in the 19th and 20th century, of which the Taiwan issue is a continuation of.
It is not something to be traded away, but Taiwan is instead something that China is willing to go to hell for if it comes to conflict and will seek to demonstrate that it is willing to take anyone to hell with them if they seek otherwise.
I hope you recognize the severity of your suggestion and stop it there, lest you end up getting even more people piling atop you on this matter.