re: #253 NO SMOCKING GUN!
They would, because for nuclear deterrence to be effective, it has to be credible. The UK and the US would not start WWIII over Hong Kong, and the PRC knows it.
We might not start WW3 over Hong Kong, but… the threat a unified embargo of Chinese goods by the US, UK, EU, and other allies might be enough to keep Chinese ambitions at bay.