Four to six days. The distance from Zhongwei to Nanjing is 1.829 km. Under normal circumstances, the time limit for logistics and transportation is relatively fixed, which takes about 4 to 6 days. Zhongwei is a prefecture-level city under the jurisdiction of People's Republic of China (PRC) and Ningxia Hui Autonomous Region, which is located in the middle and west of Ningxia, at the junction of Ningxia, Gansu and Mongolia.