School establishment refers to the nature of affiliated institutions, such as the leaders of hospitals, schools and other units, which belong to the system, and the establishment owned by teachers in the establishment is career establishment, that is, the teachers in the establishment are the staff of institutions.

The supernumerary teachers are temporary employees or contract workers. Teachers, as staff members of public institutions, generally sign a five-year contract after entering the post according to relevant regulations, and enjoy the working treatment of public institutions according to relevant regulations. But when we talk about contract workers, we generally refer to temporary employees and supernumerary teachers, generally called substitute teachers.

In addition, career establishment is second only to civil servants, because it is not as competitive as administrative establishment, so the group base of career establishment is also very large, which has exceeded 40 million. Because the establishment of public institutions is usually the subordinate departments of administrative organs and units, the post competitiveness is still not to be underestimated.