>> China is pretty scary in this way. The Han ethnic group is the majority in population and leadership and it is enacting policies to suppress the population numbers of non Han-ethnic groups in the country.

Factually incorrect. It is the opposite. Quite many ethnic groups had more right than the Han majority.

One example:

"The policy also allowed exceptions for some other groups, including ethnic minorities."

https://en.wikipedia.org/wiki/One-child_policy