Hefei has a high density of tall buildings. In the core area of Hefei city, the density of high-grade residential buildings is relatively high, which is controlled at 20%. It looks very graphic, and the density can reflect the level of a city's high-rise buildings as a whole. The state stipulates that the density of high-rise residential buildings should be controlled at 20%, not too much. Nowadays, there are more and more high-rise buildings in cities. Although high-rise buildings have brought many benefits to people, they also have many disadvantages. For example, the chain effect brought by too dense high-rise buildings is the increase of urban traffic pressure, which is not conducive to the diversion of people and vehicles.