This is obviously a hypothetical number, because the vast majority of English learners in China simply do not have access to teachers who are native speakers.

当然，这个数字还只是个假设，因为大部分学习英语的中国人都没有机会接触到以英语为母语的老师。

youdao

The evaluation is a basic checklist, and the vast majority of teachers receive satisfactory ratings.

WSJ: Teacher Ratings Aired in New York

The vast majority of teachers are simply average teachers, and this will always be the case.

FORBES: A Response to Megan McArdle

The government says the changes allow schools to hire talented people and the vast majority of teachers will continue to have the recognised qualification.

BBC: Warning of rise of 'unqualified teachers' in classrooms