At present, according to "Teachers Law" and "Regulations on Teachers' Qualifications", the teacher qualification certificate is subject to backward compatibility policy. In other words, with a certain level of teacher qualification certificate, you can serve as a teacher at or below the corresponding level, but you can't be compatible upward. For example, high school teachers can teach high schools, junior high schools, primary schools and kindergartens, but not universities. Therefore, if you are qualified as a high school teacher, you can apply from schools at all levels below high school. The teacher preparation exam belongs to a kind of teacher recruitment exam. The local education bureau issued a unified examination announcement. After being admitted to the post of teacher establishment, he belongs to the staff of public institutions. According to the relevant regulations, the contract signing period is generally five years (in practice, the contract is generally signed only once), and the salary of the institution is enjoyed according to the relevant regulations.