Health coding is a health coding system for epidemic prevention and control based on actual data. Citizens or people who have returned to work can declare online by themselves, and generate personal QR codes after background review. Generally speaking, residents' health codes are green. If the yellow code appears, it is mainly caused by the following reasons: 1, moving and staying near the key places where confirmed cases and asymptomatic infected people have stayed, and may have had contact with confirmed cases and asymptomatic infected people. 2. During the epidemic period, people staying in high-risk areas for more than 4 hours will also lead to a yellow health code. 3. During the epidemic period, if COVID-19's symptoms such as fever, headache and nausea appear, if you go to the hospital and are judged as a suspected patient, the health code will turn yellow.
For those whose health code turns yellow, it is necessary to report the situation to the local community in time, and the local community personnel will confirm whether there is misjudgment after arrangement. If there is a misjudgment, it will be collected and stamped by the local epidemic prevention office and sent to the province to turn green. If there is no misjudgment, then the person assigned the yellow code can also do the nucleic acid twice every 24 hours for three days by means of "two nucleic acids in three days", and the negative result will turn green after being uploaded to the health code in the medical institution.