It may be a volunteer or a police officer. Volunteers, together with the public security traffic police, check the vehicles entering the station every day, check the ID card, health code, boarding code and nucleic acid test certificate of vehicles in high-risk areas, measure their body temperature, and register carefully to ensure that every vehicle must be checked, everyone must be tested, and no one is missed. Strictly guard against death, firmly control the first pass of epidemic spread, and be a "goalkeeper" for people's safety.