System: MacOS 12.0. 1
The health code is based on the actual real data, which can be generated by citizens or people who have returned to work on their own 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. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.
Travel code is a code of communication big data travel card. It is the data received by China Institute of Information and Communication, China Telecom, China Mobile and China Unicom using mobile phones, and obtained through the location of the base station where the user's mobile phone is located. Provide free inquiry service for 654.38+06 billion mobile phone users nationwide. Mobile phone users can query all the city information they have been to before 654.38+04 days through this service.