Since November, the express business volume has peaked due to the centralized promotion activities of many e-commerce platforms. However, since the 4th, affected by the cold wave, the temperature in many places in China has dropped sharply, accompanied by strong winds. There is strong snowfall in North China, Northeast China, Inner Mongolia and other places. According to the State Post Office, recently, affected by the rain, snow and cooling weather, the delivery timeliness in some areas such as Beijing, Tianjin, Hebei, Shanxi, Inner Mongolia, Liaoning, Jilin, Heilongjiang, Shandong and Henan may be affected, causing express delays.