Do you need to show your health certificate during the epidemic? You can scan the code or open the health code on your mobile phone, which is convenient anytime and anywhere, but you can't check the number and type of health codes you scan.
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.