The school is a public welfare institution and mainly undertakes the function of compulsory education. The funds of such institutions are supported by the state finance, that is to say, the teachers of public schools are prepared by public institutions after passing the recruitment examination of public institutions, and their salaries are paid by the financial department.

The nature of unit refers to the nature of non-natural entities such as organs, organizations, legal persons, enterprises or their subordinate departments, which is used to distinguish the categories of working-class places.

Institutions are some public welfare units and non-public welfare functional departments whose main purpose is government functions and public welfare services. It participates in the management of social affairs, performs the functions of management and service, and aims at serving the society, mainly engaged in education, science and technology, culture, health and other activities. Its superior departments are mostly government administrative departments or government functional departments, and their actions are based on relevant laws, and their decisions are mostly mandatory, and their personnel's salary sources are mostly financial allocations. The registration of public institutions is carried out in the preparation department. Institutions sign employment contracts with employees. After a labor dispute occurs, the institution shall conduct personnel arbitration.

An enterprise unit is a legal entity or non-legal entity that independently accounts for profits. Its characteristics are self-supporting, cost accounting, profit and loss matching, solving its own personnel support and social services through its own profits, and creating wealth value. The registration of enterprise units shall be carried out in the administrative department for industry and commerce. Enterprises sign labor contracts with employees. After a labor dispute occurs, the enterprise shall conduct labor arbitration.

Institutions are generally public welfare institutions established by the state, but they are not government agencies and are different from civil servants. Under normal circumstances, the state will give financial subsidies to these institutions. Divided into fully funded institutions, such as schools, institutions in balance allocation, such as hospitals, and other independent institutions that are not funded by the state.