Institutions collect family members' information, which is convenient for relevant government departments to count the population, and also convenient for the once-a-decade population census. It is mainly to establish employment files, which is convenient for mastering family relations and social relations.

Teacher, a profession that makes a living by education. This occupation is one of the oldest occupations in human society. In accordance with laws, regulations and industry norms, students are arranged to sit down, distribute study materials, prepare lessons and give lectures, correct homework, guide and help students to study, organize lectures and practice, organize examinations, impart basic knowledge of science and culture, carry out academic exchanges, improve students' comprehensive practical abilities such as observation, study, memory and cognition, hands-on communication and operation, cultivate students' specialties, and promote morality, intelligence, physique and beauty.