Not all principals have the right to decide to hire teachers, nor do principals of public schools. Teachers in public schools have examinations organized by the education authorities. Generally, they have to go through written examinations and interviews, and they are selected on the basis of merit. There are certain conditions for candidates to participate.

Primary and secondary schools implement the principal responsibility system, and the principal has power and influence in the school. According to the needs of school work, it is the principal's right to set up posts to recruit teachers, especially in private schools. The teachers recruited by public schools themselves have not been approved by the competent authorities, and the required funds have not been included in the fiscal budget. They can only be solved by the schools themselves, so temporary substitute teachers are generally recruited.