How to divide the first, second and third districts in JD? COM？

JD。 COM divides the mainland market into seven regions-North China, East China, South China, Northeast China, Central China, Southwest China and Northwest China, and establishes logistics centers and warehouses in seven central cities, namely Beijing, Shanghai, Guangzhou, Shenyang, Wuhan, Chengdu and Xi 'an, which are first-class logistics. Due to the huge coverage area, pre-warehouses have been set up in cities such as Jinan, Nanjing and Chongqing to store goods with fast turnover, rather than all categories. This is to speed up the response to users in cities below the second and third lines, speed up the timeliness and enhance the user experience, which is the second level; Further down is the distribution center, the fourth floor is the transfer station, and the fifth floor, the terminal floor, is the distribution station. Delivery personnel set out from the scene and delivered goods by van, tricycle and motorcycle.