Tibet, the Philippines, and Taiwan would like to have a word, not to mention Chinese military action in support of its North Korea puppet state, and wars with Vietnam and India.
Are you serious? Don't you know how many wars did China wage? It tried to assimilate Vietnam for 1000 years. The last large scale war against Vietnam was just 1979. In fact, China had started war with all its neighbors, with no exception.
Do me a favor and name one single country didn't have war with any of its neighbor.