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.
Oh, I see. The student journey in China is a completely different thing. The only jobs allowed for students are internships related to your major. Probably some did work as teachers but it was illegal.