the operation is not standardized. The rookie station is a site for storing express delivery, and it is closed because of irregular operation. Maoming City is located on the coast of South China Sea in China, in the southwest of Guangdong Province, with its back to the southwest of China. Yangjiang in the east, Nanhai in the south, Zhanjiang in the west, and Yunfu and Guangxi Zhuang Autonomous Region in the north.