this also, yeah, there's plenty of people china could drop bombs on, or, opposition groups they could fund in proxy wars or civil wars, probably to their strategic advantage, and they mostly don't do it. they've taken a much softer strain in terms of geopolitics, I think.

Right now, it would be strategically unwise. They would get a lot of international blowback, sanctions, etc. As a country, it's currently better to achieve your goals with diplomacy and hostile actions that have plausible deniability. That can easily change, though. If it does, prepare to live in interesting times.