Teachers on supernumerary contracts are not only fired when their contracts expire. After the expiration of the supernumerary contract teachers' contracts, those who are not employed by the unit due to positions and other reasons can only be dismissed. If the unit needs to continue to employ, the supernumerary teachers can continue to sign employment contracts with the original unit.

Non-staff teachers cannot be graded directly, mainly because the recruitment of teachers is conducted openly through government recruitment. The supernumerary teachers are temporary or contract workers, belonging to temporary substitute teachers, equivalent to substitute teachers. Unless, supernumerary teachers can become in-service teachers through the open recruitment examination for teachers.