Definition of basic concepts
Shenzhen Central Business District
The academic circles in China have different views on the Chinese expression of CBD. Early scholars translated it into "Central Business District" and "Central Business District"; With the further study of CBD, at present, China academic circles generally call CBD "Central Business District" or "Business Center District".
The influence of city size and form
The scale of urban land use is related to the formation of sub-CBD. Only when the urban land exceeds a certain scale can the sub-CBD appear; The bigger the city, the more sub-CBD. Megacities may have more than 4-5 sub-centers.
The guiding mechanism of urban form to the formation of sub-CBD is mainly manifested in group cities. Due to the limitation of topography or water body, the gathering and radiation functions of CBD in a cluster city composed of several relatively independent urban plots are difficult to achieve in the whole city due to congenital deficiency. Because it is difficult for each group to get comprehensive and perfect services from the core CBD, they form relatively perfect service centers in their respective advantageous lots. Among them, some group centers have become sub-CBD and incorporated into the urban CBD system because of their advantages in scale, energy level and function.
Functional characteristics
The CBD system includes the core CBD and several sub-CBD, which together form a complete system, transforming the city from the original single-center structure to the multi-center structure. The premise of the healthy development of CBD system is that core CBD and sub-CBD perform their respective duties, which are independent and complementary to each other. Core CBD is the advanced stage of CBD development. In the long-term development process, after many functional adjustments, the functional connotation is gradually advanced. In the industry structure, the central business is the main function, while the primary functions such as retail and catering have gradually retreated to a secondary position. In the sub-CBD, the central business function is one of the main functions.
Supplement to the Convention on Biological Diversity
The sub-CBD is not a simple repetition of the core CBD, but a complementary effect of the core CBD. Megacities usually have 4-5 sub-centers, and the function of each sub-center is not small and comprehensive, but has its own emphasis. Even a comprehensive sub-CBD is not as comprehensive as CBD.
Simple and unique function
In fact, the original intention of the sub-CBD construction is not to build a "small but comprehensive" service center, but to build a new highland with distinctive features in the service industry. Therefore, in more and more sub-CBD, there are only a handful of sub-CBD with comprehensive functions. Most secondary CBD ranks among its own CBD system with its unique characteristics. The uniqueness of the function is not only the foundation of the sub-CBD, but also the key to the mutual connection and complementarity between it and the core CBD and the construction of the urban CBD system.