Generally speaking, the primary industry refers to the department that mainly uses natural forces to produce products or industrial raw materials that can be consumed without deep processing.
The secondary industry is an industrial department that processes the products (raw materials) provided by the primary industry and this industry.
The tertiary industry in China includes two major departments, namely circulation and service, which are divided into four levels:
1. Circulation department: transportation, post and telecommunications, commercial catering, material supply and marketing and warehousing;
2. Departments serving production and life: finance, insurance, geological survey, real estate management, public utilities, residents' services, tourism, information consulting services and various technical services;
3. It is a department that serves to improve the scientific and cultural level and the quality of residents: education, culture, radio, television, scientific research, health, sports and social welfare;
4. State organs, political party organs, social organizations, police, army, etc. , but they are not included in the tertiary industry output value and gross national product of China.