According to the United Nations classification method:
The primary industry mainly refers to industries that produce food raw materials and other biological raw materials, including planting, forestry, animal husbandry, aquaculture and other industries that directly target natural products.
The secondary industry mainly refers to the processing and manufacturing industry that uses the basic materials provided by nature and the primary industry for processing.
The tertiary industry refers to other industries other than the primary and secondary industries, with a wide range, mainly including intangible production departments such as transportation, communication, commerce, catering, finance, education and public services.
Extended data:
Specific classification of tertiary industry:
According to the Opinions of the National Bureau of Statistics on Establishing Statistical Statements of the Tertiary Industry forwarded by the General Office of the State Council, China's tertiary industry includes two major departments: 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. Departments to improve residents' scientific and cultural level and quality: education, culture, radio, television, scientific research, health, sports and social welfare;
4. State organs, political party organs, social organizations, police, army, etc. , but not included in China's tertiary industry output value and gross national product. It can be seen that this tertiary industry is basically a service industry.
Baidu Encyclopedia-Three Industries
Baidu encyclopedia-tertiary industry