None of that is going to happen.
China is much more powerful than you think,
Most African, South American and Asian countries would back China over Dementis Joe's American any day."
If/when Chi-Coms invade Taiwan, they will face, first & foremost Taiwanese opposition determined to keep themselves free & independent.
The fact remains, however much you wish to ignore it, that Chi-Coms must cross about 100 miles of ocean to reach Taiwan, and every ship or aircraft is vulnerable to missiles & guns designed to sink or shoot them down.
Foreign support for Taiwan will first come from all the major Asian powers, from India & Australia to the Philippines, Japan & South Korea.
It will include economic actions like "embargo", "quarantine" or "sanctions", etc. that could effectively stop Chi-Com foreign trade, even without the military actions of enforced blockade.
How much of Chi-Com military & infrastructure would be destroyed in such an invasion is anybody's guess, but my guess is, it would be significant.
And the invasion would fail, so why even attempt it?
The sane thing for Chi-Coms to do is stay within their borders, make peace with their neighbors and live a really good life.
They should be thankful that the only way their good life can end is if they go insane over Taiwan.
I guess we'll find out which they prefer...