I know this is not a scientific question (well, may political science or world science?

), but with the diverse and intelligent membership here, I’m very curious what your opinions are on this.
As most probably know, China is making noises about Taiwan again with the introduction of the bill authorizing military force against Taiwan. Is China making a statement here – “We’re taking Taiwan back and everyone stay out of our way”? or are they just posturing?
If China does force the issue and invades Taiwan, what options do the Taiwanese allies (US, Australia, others?) have??
One last question (and the one that has me most worried) – China moves on Taiwan and the US (and others)provide military support (of some sort) for Taiwan. What’s to stop China form saying – OK US, you’ve attacked us, so we’re nationalizing all companies/businesses in China – thereby allowing China to take control of all US or non-China owned factories, inventories, technology, etc. Many US companies have and continue to pour millions upon millions of dollars into building Chinese factories. What would it do to the US economy if China were to take control of these factories? I would expect many companies to be forced into bankruptcy.
Anyone have any thoughts on this?