Author’s website: www.piecomic.com
I wouldn’t say that makes them an ethnostate (considering the obvious genetic, cultural, and language diversity among Han ethnicities) but the forced Mandarin and Uyghur re-education camps are better arguments
“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.