Look at conquered regions like Tibet and Xinjiang.
Look at how they set up police forces in foreign countries to keep an eye on Chinese citizens living abroad. Even having kidnapped and illegally held Chinese citizens in England because they posted anti-CCP messages on WeChat.
Look at countries like the Phillipines (not even a direct neighbour) who are trying to hold on to small fishing islands just off their coast because the CCP claimed those islands in the 1970s.
Remember a few years ago when they ran a week long military exercise around Taiwan... because a US representative spoke to the Taiwanese president. Sure I agree with you that the US also overstepped a line here, but for your response to be shelling the waters around the island is excessive to say the least.
Look at the aggressive nationalist and imperialist news they feed their own population, and the propaganda spread to make the Japanese seem like demons. Did you know there are several theme parks in China where children are encouraged to Bayonette a mannequin of Japanese Imperialist soldiers?
Call the US as bad as you like, but I've never seen a theme park where children are actively taught how to kill and demonise the Taliban or Nazis.