According to relevant information, people with suspected symptoms are shown. If you have fever, cough, diarrhea and other suspected symptoms within/0/4 days before applying for the health code, or you are refused boarding by the airline because of high body temperature and suspected symptoms, you can't get the health code.
Health code is a personal two-dimensional code based on actual real data, which is 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.