So, which countries did China liberate from oppression? What did the CCP/its predecessor movement actually do? Standing aside while the NRA fought the Japanese. Instead of helping and preventing some major bloodbaths, Mao and his army just abided their time. After the power change, the Long March, the Cultural Revolution and whatever havoc I forget, China was too weak to do anything, let alone invade countries. Now it's stronger, and seems remarkably poised for war.

Your "US bad because invasion" is a tankie frame. Yes, that refers to the Tiananmen tanks.