China is probably not yet ready to mount a complex air-sea invasion of Taiwan, with the mighty USA at its back. But it would have no real difficulties making land invasion into Russia.
Taiwan.. not yet, too hard, but Russia is officially a GO opines our dunk tank subject, further free military advice for China can be found in the article
HOI4 and it's consequences. The US couldn't even deal with Afghanistan, but somehow all the military pundits in the west still think "yeah annex territory of a hostile populace, that's what they want". Why? For what reason? What would there be to gain?