One card, one code, one card means exactly the same thing: 48-hour nucleic acid negative certificate, health code green code and communication trip card for incoming and outgoing people at railroads, airports, road passenger terminals and road access points.
The new crown pneumonia "mask" prevention and control period, from the medium-high risk area personnel, or enter the school, supermarkets, medical institutions and other crowded places to check a card, a code and a card. One card refers to the travel card, one code refers to the health code, and one certificate refers to the nucleic acid test certificate. This ensures that people from medium to high risk areas and close contacts are detected and isolated in a timely manner.