How to define "multi-storey, small high-rise and high-rise"?

The building type is simply: according to the building height, it is divided into low-rise, multi-storey, small high-rise, high-rise, super-high-rise 1-3, 4-7 floors are multi-storey, 8- 12 floors are small high-rise, and 12 floors are high-rise, with a total height exceeding 100m. According to the regulations, elevators must be equipped for floors above 7. \ r \ Low-rise building A low-rise building refers to a building with a height less than or equal to 10 m, generally a building with 1-3 floors, such as bungalows and villas. Low-rise buildings are generally simple in structure, short in construction period and low in construction cost, giving people a kind, peaceful and earthy feeling, and their comfort, convenience and spatial scale are superior to those of high-rise buildings. People especially like living here. Low-rise buildings occupy a lot of land, and the land utilization rate is low, especially in cities with scarce land. \r\n Multi-storey houses Multi-storey houses refer to buildings that are higher than10m and lower than or equal to 24m. Multi-storey houses are generally 4-7 floors, generally adopting brick-concrete structure, and a few adopting reinforced concrete structure. Multi-storey houses generally have neat specifications (room type), good ventilation and lighting conditions, and compact space without shelter. Compared with high-rise buildings, multi-storey houses have less public area and higher housing acquisition rate, which is the main reason why many people like multi-storey houses. \r\n High-rise building A high-rise building refers to a building with a height of more than 24 meters. Buildings with more than 8 floors (including 8 floors) can generally be divided into small high-rise, high-rise and super high-rise. The small high-rise of 8- 12 floors is generally called "small high-rise". Small high-rise residential buildings generally adopt reinforced concrete structures with elevators. Small high-rise buildings not only have the characteristics of multi-storey kindness and tranquility, good room type and high room rate, but also have the advantages of high strength, long service life, high landscape coefficient and low pollution of ordinary high-rise buildings, which are very popular among buyers. At the same time, it improves the utilization rate of land for small and high-rise buildings, and the land cost is relatively reduced, which is very popular among real estate developers. \ r \ nSo, in recent years, there are more and more small high-rise buildings in the central city. Due to the limitation of building structure and architectural form (mostly point-shaped), it is very difficult to design the room type of high-rise buildings (referring to buildings above 12 and below 24 floors), and it is very difficult to make each room fully bright, well-lit and well-ventilated. In the central area of the city, high-rise buildings have their advantages: for developers, the land cost per unit construction area (that is, "floor price") is low; For residents, it has wide vision, high landscape coefficient, less dust, noise and light pollution, high structural strength and strong integrity. However, high-rise buildings also have obvious shortcomings: complex structural technology, high material performance requirements, heavy weight, high requirements for foundation and great construction difficulty, which correspondingly increases the project cost; High-rise building elevators, corridors, computer rooms, technical floors and other public parts occupy a large area, and the room rate is low; If the elevator quality is unreliable and the property management is abnormal, it is very worrying.