A:2nd: Have a look, who qualifies for a legal English teaching work in China ..., i.e. only native English teachers, UK, Ireland, USA, Australia, New Zealand and S. Africa passport holders and no one else. 

https://www.gooverseas.com/blog/guide-teaching-english-china#paragraph-item-63614-target

*English proficiency: Passport from one of seven "native speaker" countries (US, UK, Canada, Australia, New Zealand, Ireland, and South Africa). If you aren’t a native speaker, you’ll need to be a certified teacher in your home country with proof of your English proficiency (e.g. IELTS or TOEFL). -- icnif77