Take Nokia 105 as an example, the health code cannot be displayed on the elderly machine. If users use the elderly machine, they can use a paper health pass, which can be audited by the local community or village Committee, or they can go to the local police station to apply for a pass.
Health codes are based on actual data and can be generated by citizens or people who have returned to work through online declaration and background audit. As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city.