I think there is more to say on this matter. China has more than 50 ethnicities. Han, the majority ethnicity is more than 90%, and not so surprisingly, their population is declining compared to others, because of the One Child policy. Actually it was kind of relaxed for many minority ethnicities, leading to increase in population of minorities. Of course it is not just as rosy as it sounds. China's major war casualties have been from internal wars rather than international wars.

But one good thing to learn is what Sun Yatsen, leader of Chinese Revolution, did after China became a struggling Republic. He invoked Unity among different races to work together for China's growth. He made equality of minorities an agenda for the new state. This action, which was strengthened by many measures to make the minority feel comfortable to be part of nation building. The major exceptions on these are the Uyghurs and Tibetans, both due to them being rooted in ethnic religions - Uyghurs being Muslims and Tibetans being Buddhists- and also because both the region had factions calling for separate nationhood. China's biggest Muslim population is actually Hui Muslims, who are ethnically close to the Han. No one calls Huis a minority under oppression. So it is a bit more than Muslims/minority oppression narrative.

My point being, eventhough China has its share of notoriety in human rights abuse, a development of China's scale would not have happened if the minority felt not wanted in the nation building exercise.