What happened when the yellow code turned green and the code didn't form data?

1, insufficient nucleic acid. Under normal circumstances, the person given the yellow code will receive the relevant SMS notification, requesting two nucleic acid tests within three days or three nucleic acid tests within seven days. However, after the first test, the "green code" will usually be temporarily restored, and the following nucleic acid tests will be continued as required. If the number of nucleic acid tests is not completed or the result is not negative, it will not become a green code. It is suggested that the corresponding nucleic acid detection should be completed as soon as possible according to SMS requirements. 2. The epidemic situation has changed. If you finish the corresponding nucleic acid times, the results are all negative, but they are still yellow codes, which may be related to the list of people assigned yellow codes. For example, those who flow and stay in the vicinity of key places where confirmed cases or asymptomatic infected people have stayed again, and may have had contact with confirmed cases and asymptomatic infected people, will be assigned a yellow code according to the contact time. The nucleic acid tests done before cannot be used as a basis for no infection risk and need to be re-tested. How many nucleic acid tests are needed to change the yellow code to the green code, which is related to the reason for allocating the yellow code, usually 2-3 times. 1. If the yellow code personnel are not involved in the due diligence of nucleic acid, they can turn to the green code after only one nucleic acid sampling. 2. If the yellow code personnel are the key population involved in the epidemic, that is, those who have stayed in the same place and around the case for more than a certain period of time are assigned yellow codes, they need to be tested for 3 days or 3 days, that is, if the yellow code turns green, they need to be tested for 2 or 3 times, and the specific number is subject to the local epidemic prevention and control notice.