The fire hazard level can be divided into light hazard level, medium hazard level, severe hazard level, and warehouse hazard level. 1. Light hazard level: Buildings for the elderly, buildings for young children, hotels and office buildings with a height of 24m or less. Buildings with closed systems only installed in walkways, etc. 2. Medium risk level: high-rise civil buildings: hotels, office buildings, comprehensive buildings, postal buildings, financial and telecommunications buildings, command and dispatch buildings, radio and television buildings (towers), etc. 2.1 Public buildings (including single and multiple high-rise buildings): hospitals, sanatoriums, libraries (excluding stacks), archives, exhibition halls (halls), cinemas, music halls, auditoriums (excluding stages), and other entertainment venues, railway stations, airports, and docks, shopping malls with a total construction area of less than 5000 square meters, and underground shopping malls with a total construction area of less than 1000 square meters. 2.2 Cultural Heritage Buildings: Wooden structure ancient buildings, national cultural relics protection units, etc. 2.3 Industrial buildings: Material preparation and production workshops for factories such as food, household appliances, and glass products, as well as building components such as refrigerated warehouses and steel roof trusses. 2.4 Civil buildings: bookshelves, stages (excluding grape racks), car parking lots, shopping malls with a total construction area of 5000 square meters or more, and underground shopping malls with a total construction area of 1000 square meters or more. 2.5 Industrial buildings: Material preparation and production workshops for cotton, wool, hemp, silk and chemical fiber textiles, fabrics and products, wood and plywood, grain processing, tobacco and products, drinking alcohol (excluding beer), leather and products, paper and paper products, pharmaceutical and other factories. 3. Serious hazard level: Material preparation and workshops of printing factories, alcohol products, flammable liquid products, and other factories. 3.1 Preparation of materials for the flammable liquid spray operation area, solid flammable materials, flammable aerosol products, solvents, paints, asphalt products and other factories, and the lower part of the production workshop, studio, stage "grape trellis". 4. Warehouse hazard level: non flammable and combustible items packaged in food, tobacco and alcohol, wooden boxes, cardboard boxes, and shelf areas in warehouse style shopping malls. 4.1 Wood, paper, leather, grains and products, cotton, wool, hemp, synthetic fibers and products, household appliances, cables, Group B plastic and rubber products, steel-plastic mixed material products, non combustible items packaged in various plastic bottles and boxes, and warehouses for mixed storage of various items. 4.2 Group A plastic and rubber products, asphalt products, etc