The key places for epidemic prevention and control in COVID-19 refer to places with dense personnel and closed space, which are prone to cluster epidemics, such as stations, ports, airports, docks, public transportation (cars, trains, planes and subways), logistics parks, nucleic acid detection points, farmers' markets, hotels, shopping malls, supermarkets, fitness and entertainment places, hairdressing and bathing places, theaters, stadiums and so on. Therefore, the Customs belongs to the epidemic prevention and control unit, mainly to prevent foreign materials or personnel from bringing into COVID-19.