Do all teachers who are editing across disciplines in Yixing have to take the exam?

Teachers who are editing across majors in Yixing don't have to take the exam.

Teachers in editing are career editors, that is, teachers in editing are staff of public institutions. Non-editorial teachers are temporary or contract workers.

Teachers, as staff members of public institutions, generally sign a five-year contract according to relevant regulations (generally only one contract is signed in actual operation) and enjoy the working treatment of public institutions according to relevant regulations, but the contract workers we refer to generally refer to temporary workers.

Non-editing teachers are generally called substitute teachers.