If China did take that path, they'd maybe succeed in the short...

If China did take that path, they'd maybe succeed in the short term though Ukraine has proven a motivated defender can cause a lot of damage and Taiwan has been preparing for a conflict with the CCP for 70 years. But even if they succeeded militarily the economic sanctions and probable US and Allied naval blockade of all shipping would neuter them within a year. ie no oil or food products from seaborne trade. Since they are an importer of energy and food compared to Russia being an exporter, they'd be in a bit of strife once their reserves had been depleted. Famine, insurrection, dissolution. Plus their entire economy is based on the Global freeish trade order and without US and Western markets they'd be screwed.

So I hope they won't but Xi being Xi, who can be sure, I see some analysts with a 30% chance of war, may not seem like much of a chance but I'd buy a lotto ticket with those odds!