How is industry defined?

In China, industries are divided as follows: the primary industry is agriculture, including agriculture, forestry, animal husbandry and fishery; The secondary industry is industry, including mining, manufacturing, tap water, electricity, steam, hot water, gas and construction; The tertiary industry is divided into two parts: communication and service, with four levels: ① circulation department, including transportation, post and telecommunications, commerce, catering, material supply and marketing and warehousing. ② Departments serving production and life, including finance, insurance, geological survey, real estate, public utilities, residents' service, tourism, consulting information service and various technical services. (3) Departments that serve to improve the scientific and cultural level and quality of residents, including education, culture, radio, television, scientific research, health, sports and social welfare. (four) departments that need to serve the public, including state organs, political party organs, social organizations, the army and the police.