China’s stance on Taiwan is clear[1] but given Taiwan doesn’t agree, it has remained independent despite what China says. The same was true for Hong Kong until recently, however, so concerns remain.
The US is waking up to realizing that they have a heavy reliance on China for civilian goods and a slight to moderate risk that it might be disrupted or used against them in future.
The worry I suppose is that it might be easier for supply chain-based attacks to weaken US defences, not that we’ve seen anything like this in practice yet due to how easy it is to exploit existing software bugs, for example.
1. https://www.cfr.org/backgrounder/china-taiwan-relations-tens...
Not true. HK has been Chinese territory after 1997, there are PLA deployed in HK. There is no doubt about China's military capacity there, had the party really wanted to use it.
For Taiwan that is never the case.
China broke its word and trashed the deal. Eventual certainty notwithstanding — the CCP demonstrated (as it has oh so many other times) that their word is unusually unreliable, even in the shitty arena of international politics.
HK relies on Chinas word. Taiwan doesn't.
That's pretty different to Taiwan which has never been under the sovereignty of China.
You see, if China agreed with your statement diplomacy would be a lot easier. But few things anger the Chinese more than asserting that it does not have sovereignty over Taiwan, the only other one I can think of is that Tibet should be free to be its own country.
But Taiwan has a functional, large military, friends in Washington and economic consequences to an invasion.
HK had umbrellas and a few strongly worded newspaper columns.