China Securities Index Company draws lessons from the international mainstream industry classification standards and adjusts according to the characteristics of domestic listed companies, and divides domestic listed companies into 10 first-class industries. These ten first-class industries cover almost all industries in our daily life. First-level industry coverage: energy: energy mining equipment and services, oil and gas, coal; Raw materials: chemical raw materials, chemicals, building materials, containers and packaging, non-ferrous metals, steel, non-metallic minerals and products, paper and forest products; Industry: aerospace and national defense, building products, construction and engineering, electrical equipment, machinery manufacturing, industrial group enterprises, environmental protection equipment, engineering and services, commercial services and supplies, air freight and logistics, airlines, scheduled transportation, road transportation and transportation infrastructure; Optional consumption: auto parts and tires, automobiles and motorcycles, household durable consumer goods, leisure equipment and supplies, textiles and clothing, jewelry and luxury goods, hotel catering and leisure, comprehensive consumer services, media, daily necessities dealers, internet retail, diversified retail and other retail; Main consumption: retail food and main supplies, beverages, packaged food and meat, tobacco, agriculture, animal husbandry and fishery products, household items and personal items; Health care: medical devices, medical supplies and service providers, biotechnology, pharmaceuticals, pharmaceuticals and biotechnology services; Financial real estate: commercial banks, mortgage credit institutions, other financial services, consumer credit, capital markets, insurance, real estate development and parks, real estate management and services, and real estate investment trusts (REITs); Information technology: Internet services, information technology services, software development, computers and peripherals, electronic equipment, semiconductors; Telecom services: telecom operation services, telecom value-added services and communication equipment; Public utilities: electricity, gas, heating or other public utilities, water and power grid.