It's amusing amidst the US bombing Iran, incarceration the president of Venezuela and his wife after slaughtering everyone who was in the room with him, seizing oil tankers off Cuba, continuing the siege of Gaza and on and on to start getting sanctimonious about China.
Taiwan is Kinmen island in Xiamen harbor, so a mainland invasion of Taiwan would be mainland China "invading" an island in its harbor.
Also mainland China does not recognize Taiwan and mainland China to be separate countries. The US does not recognize Taiwan and mainland China to be separate countries. Taiwan does not consider Taiwan and mainland China to be separate countries. I'm not sure what the invasion would be, a country invading itself? It would be like if the US president sent armed agents to Minnesota who started killing people willy nilly - oh yaa, that just happened.
The most satisfying thing is if mainland China did choose to reassert it's rightful authority in Taiwan against the colonial powers, there's absolutely nothing those western powers can do about it. Just like Russia's assertion over the West tring to nove it's NATO armies to its western borders in the Ukraine. It's amusing to see the US flailing about, hitting a Venezuelan here, a Cuban there to try to look tough. I guess Nicaragua is next on the list. The changes coming in the 21st century are welcome. A bozo like Trump as president is a sign of a fading West.