The law only says teachers must come from a native English-speaking country, the big 5: Canada, UK, USA, South Africa and Australia. Twenty yuan says this requirement isn’t from Chinese people, it’s for some school for children of racist diplomats. Beijing is just the worst.
it’s illegal to say “whites only” on a job ad. The only legal way to hire only white people is to not mention race as the reason you picked specific applicants when asked or documenting.