I disagree, in the exact opposite direction. I believe that China is 91% Han Chinese... ad Taiwan is 95% Han.
BTW: On mainland China, they tend to treat non-Han Chinese pretty poorly... but not as bad as blacks or Japanese.
(But American whites are somehow the only racists on earth)
I don’t see the Manchurians represented. The Han definitely didn’t think they were Han particularly when they replaced the Ming . https://en.wikipedia.org/wiki/Manchu_people
Also you can subdivide the western area up more the Turkic peoples there break down a little more.
https://en.wikipedia.org/wiki/List_of_ethnic_groups_in_China
If Xinjiang breaks away, can Han go solo?
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:-)