What evidence exists to show that China is preparing to annex Taiwan? Satellite troop movements? Natural resource hoarding? Anything at all?
If China, or anyone, invaded Taiwan it would be fantastically easy to cripple tsmc fabs. Kill their engineers en masse. Blow up the lithography machines. Unleash a targeted virus like stuxnet designed for the hardware in the facilities on their networks. An important question remains, does China have the footing to not only fill the vacuum in their supply chain but to also weather the sanctions and quite possibly engage the us and its allies without turning cities to irradiated glass and starting nuclear winter?
I seriously doubt that China is secretly prepared to meet their own domestic demand for advanced silicon let alone call bluff of the five eyes.
That said, maybe xi is actually more out if touch than Putin and we’ll be cowering in fallout shelters come summer.