No courier has been found to transmit novel coronavirus pneumonia, but it is theoretically possible that courier packages carrying respiratory secretions from other infected individuals may also carry the virus. Some research teams also did study the survival time of novel coronavirus pneumonia in vitro, in different ambient temperatures, humidity, different ventilation conditions, different material object surface virus survival time differences are relatively large. The longest survival time may be smooth plastic surfaces, smooth metal surfaces such as copper, the survival time may be more than one or two days. But on rough surfaces such as clothing and tissue, the longest survival time may only be a few hours. Once the human respiratory secretions are dry, these new coronaviruses are no longer able to enter the air, there is no way to spread through the respiratory tract. But if there are respiratory secretions from an infected person on top of the courier package, it is actually possible to have a live virus for a short period of time. If our hands touch these respiratory secretions and then rub our eyes and touch our mouth and nose there is theoretically a risk of infection. Although the probability is very low, but it is recommended that when we receive a courier, remove the outer packaging as soon as possible, or spray the surface of the packaging of the courier with alcohol, so as to reduce the risk of transmission to a greater extent.