Furthermore, the characterization of China being "totalitarian" is wrong because China is in no way comparable to the likes of North Korea or Saudi Arabia. You should check out the works of political science professor Daniel A. Bell: https://youtu.be/ckt94_JWHPs
This isn't a "coincidence". The Chinese government has evolved to its current form because of Chinese values. The CCP won the civil war because it had support of the majority of the population.
Han supremacism — while it exists — is largely not a thing and certainly not state policy. State policy is that minorities receive extra benefits that Han do not enjoy, and that the provincial government heads of minority provinces must be of those ethnicities.
Please go to China and tell a Chaoxianzu he's not Chinese. He'll tell you to fuck off.
Please go to China and tell people that the KMT should have won the civil war and see how people react.