As somebody already mentioned, Tibet.

They've also destroyed multiple vessels including civilian ships near the Philippines.

The provided armaments to Iran which ended up in the hands of Hamas leading up to the October 7th music festival attack, which sparked the flames for the ongoing genocide. Iran also used those weapons on their own civillians earlier this year resulting in between 6k and 40k civillian casualties depending on your source which is actually higher than the casualties for the ongoing war with the USA (which can also somewhat be attributed to China due to the afforementioned hostilities with Israel (and China literally aided in Trump's reelection)). They're also the source of weapons for the Houthis and Lebanon.

In Asia they are the military backers of North Korea, who actively threatens to destroy Japan. In the past they've armed factions who committed coups in Vietnam, Myanmar, and Myanmar AGAIN. They also supplied weapons to Indonesia which likely ended up getting used somewhere in Papau, but that one isn't as fair because at this point who hasn't sold to Indonesia.

In Central and South America they are the military backers for Cuba, Venezuela, and Nicaragua, all militant dictatorships.

In Africa, they rebuilt the Mwalimu Julius Nyerere Leadership School which is established as a collaboration between the CCP and the Former Liberation Movements of Southern Africa. This is the most benign entry on this list so far, but looking at China's track record you can probably see where it's going to end up.

The also did all of this to Hong Kong:

And if they weren't too busy executing their own military leaders, chances are they'd be invading Taiwan already. Chinese Military spending is growing massively, growing about 5x in 20 years. Currently, China contests lands in Taiwan, Vietnam, North Korea, South Korea, and India (which China claims is actually Western Tibet) and they're getting less "diplomatic" about it every day.

Also, China has promoted conservative leaders including the GOP and even Donald Trump by name as well as the AfD.