Different viruses have different survival times on the courier in different environments (temperature, etc.), and only room temperature and pressure are discussed here, where the new coronavirus may survive on the courier for 1 to 3 days. According to relevant studies, under laboratory conditions (normal temperature and pressure) it can exist on plastic and stainless steel surfaces for 2~3 days, on cardboard/wooden boards for 24 hours, and on copper surfaces for only 4 hours. Express delivery generally uses cardboard or plastic bags for packaging (not considering fresh food, etc.), and under normal temperature and pressure and normal humidity, the new coronavirus is estimated to survive for 1~3 days. New coronavirus through the respiratory droplets, close contact and aerosol transmission in a closed environment, in the formal sterilization can effectively eliminate the virus on the courier, so do a good job of protection in the case of the courier virus sterilization, then do not have to worry too much about the contact and lead to the spread of transmission.