About the submission of original certificates to apply for a teaching vacancies in China

Hello everybody. I am a Spanish native speaker and English teacher who wants to try my luck and get a job offer in China. I have two questions and would really appreciate as much advice as I can get from this community.

First, should I still apply for positions where the recruiter states they want only native English speakers?

Second, when submitting my certifications initially, is it acceptable to send a photocopy of my original Bachelor's Diploma in Spanish, or do I need to provide a translated version from the start? Should I send a PDF with both the original diploma and a simple translation?

Any advice from teachers with experience in this process would be greatly appreciated. Thank you so much in advance.