The principal, in the Qin and Han Dynasties, was a junior officer, and later evolved into the head of school administration appointed by the national education administrative department or the administrative department of other educational institutions. In addition, many people are nicknamed "principals".
Main responsibilities:
The person in charge of school administration appointed by the administrative department of education of the state or other educational institutions. The headmaster comprehensively manages the school affairs, represents the school externally and presides over the school affairs internally.
Baidu Encyclopedia-Principal