Classification and Code of National Economic Industries (GB/4754-20 1 1), classification of national economic industries. Agriculture, forestry, animal husbandry and fisheries; B. mining industry; Manufacturing industry; Production and supply of electricity, heat, gas and water; Construction industry; Wholesale and retail trade; G. transportation, warehousing and postal services; Accommodation and catering industry; I. information transmission, software and information technology services; J financial industry; K real estate industry; Leasing and business services; Scientific research and technical services; Water conservancy, environment and public facilities management; O Resident services, maintenance and other services; P education; Q. Health and social work; R Culture, sports and entertainment; Public management, social security and social organization; T international organization