1. China has a totalitarian ruling system. They intend to realize George Orwell's 1984.
2. Present-day China essentially has no ethics. Take the US in comparison. No matter how perverse the people in power become and even if they do messed up things, the US has some founding morals and principles they do not forget. China, in comparison, systematically rooted out these values since the Great Leap Forward. The happenings at Hong Kong and Xinjiang epitomize that.
I do think China's expansionist policy bodes poorly for all of humanity.