The CBD highly concentrates on the city’s economic, technological, and cultural forces. It also has many functions such as finance, trade, services, exhibitions, and consulting. The specific functional requirements of the CBD must be high-density and modern in the area. As a result, the CBD has gathered a large number of magnificent, patchwork high-rise buildings and has very convenient transportation and modern information exchange systems, as well as a large number of office, catering, service and accommodation facilities. Generally speaking, the office space accounts for 50% of the total construction area, commercial, catering and commercial and residential buildings account for about 40%, and other service facilities and necessary supporting facilities account for about 10%.