Is the headmaster afraid of the head of the personnel department?

Not afraid. Departments with different scores between the principal and the person in charge of the personnel department have no business dealings, and they all serve the people and are not afraid. The responsibilities of the chief of the personnel section are: responsible for organizing the drafting, revision and improvement of human resources-related management systems and workflows, and responsible for recruitment, training, performance appraisal, employee relations and other affairs.