According to the Education Law of the People's Republic of China, the Teachers Law of People's Republic of China (PRC), the National Qualifications and Post Requirements for Principals of Primary and Secondary Schools (Trial), the Professional Standards for Principals of Compulsory Education Schools and relevant laws and regulations, the working age of principals should not exceed 54 years old in principle. The age of newly hired primary and secondary school principals is generally under 45, and they should generally serve as vice principals for more than 3 years; Newly hired deputies are generally under the age of 40, and should generally serve as the middle-level management person in charge of the school for more than 3 years. City management cadres are managed by age. For cadres who have served as principals for a long time, outstanding work performance and high social recognition, their length of service may be appropriately extended according to the management authority of cadres, but the longest is not more than 5 years.