All China has to do is blockade Taiwan, like literally, blockade them until they surrender, how much food does Taiwan have? Fuel? all other goods?

Quite literally, China could do to Taiwan just like the US does to Cuba.

And do you really think Chuan Jinguo will help Taiwan? Probably not.

But most likely, Taiwan is just going to become like Hong kong.

The best route for asia, would be for the US to pretty much fuck off, and japan, korea, australia and china just work things out, China is not really a offensive neighbour like the US, most of the chinese war have been after their de jure lands, you "probably" won't see china invading iraq, or some african or middle eastern nation, china likes to think long term and rule by economic investments, while the US likes to just bully until countries give up.

The best scenario, would be for south korea to reconcile with china, and drop the US support, if they do that, china would probably stop helping north korea too.

That means north korea falls and the koreas unite.

The main problem China has with south korea, is the same problem everyone has with the US, their stupid military bases.