it can be roughly divided into three major sectors: industry sector, regional sector and concept sector, with 91 categories of subdivision.

1. A shares include agriculture, forestry, animal husbandry and fishery, B shares include mining, C shares include creation, D shares include electricity, heat, gas, water production and supply, E shares include construction, F shares include wholesale and retail, and G shares include transportation, warehousing and postal services.

2. I-share includes information transmission, software and information technology services, J-share includes financial services, K-share includes real estate, L-share includes leasing and business, M-share includes scientific research and technical services, and N-share includes water conservancy, environment and public facilities management.

3. The O-share sector includes residential services, repairs and other services, the P-share sector includes education, the Q-share sector includes health and social work, the R-share sector includes culture, sports and entertainment, and the S-share sector includes 91 comprehensive categories.

1. Concept plate: lithium battery, military industry, aerospace, new energy, low carbon economy, scarce resources, circular economy, Internet of Things, smart grid, railway infrastructure, gold concept, 3G concept, equity incentive fund, heavy asset injection, spin-off of listed rare earth permanent magnet polysilicon and other concepts.

second, the industry sector: financial industry, jewelry industry, steel industry, furniture industry, petroleum industry, road and bridge industry, automobile industry, transportation, medical equipment, hotels, tourism, real estate industry, commercial department stores, materials, foreign trade, food industry, textile industry, power industry, agriculture, forestry, animal husbandry, fishery, media, entertainment, chemical industry, coal industry, building materials and other industries.

iii. regional plates: Xinjiang plate, Jilin plate, Gansu plate, Liaoning plate, Qinghai plate, Qinghai plate, Beijing plate, Shaanxi plate, Tianjin plate, Guangxi plate, Hebei plate, Guangdong plate, Henan plate, Ningxia plate, Shandong plate, Shanghai plate, Shanxi plate, Shenzhen plate, Hubei plate, Fujian plate and other regions.

1. There are 19 categories and 91 sub-categories in China stock market. The stock market plate is divided into two categories: industry plate classification and concept plate classification. Under each big plate, there are several small plates.

2. Classification of industry sectors The official classification of listed companies by the China Securities Regulatory Commission has clear classification standards; There is no uniform standard for the classification of concept plates, but there are methods of regional classification and time to market classification.