"Ethnostate - noun. a state that is dominated by members of a single ethnic group." That exactly makes them an Ethnostate. Mandarin and Uyghur re-education camps is authoritarianism.
Han Chinese isn't a single ethnic group. They don't speak the same language and they're genetically and culturally diverse. The CCP is attempting to erase that diversity to become an ethnostate.
Just because you disagree with a definition, doesn't mean it's wrong.
Every country is culturally diverse, but there's still statistical common denominator. You have big differences in languages, accents, food, culture in the UK and yet 82% are white British. Same goes for Germany, Japan etc. Every country do their demographic analyses differently, but the point is that they all can have major differences within the same ethic group.
So we should either agree to use the same definition or agree that it has no meaning and not use that word at all.
I agree with your definition of ethnostate and everything you said. But Han Chinese is strictly not a single ethnicity and it is purely to the CCP's advantage to say it is.
edit: Han is what we might call a race, in that it's a bunch of distinct ethnicities bundled together via social construct for the purposes of allying that group of ethnicities against the others. So China is a racist state, but not an ethnostate, because an ethnostate is "a state that is dominated by members of a single ethnic group."
