2. Therefore, if the health code turns yellow, it is not necessarily infected with COVID-19 virus. It is recommended that you go to the nearest temporary sampling point (or medical institution) as soon as possible for nucleic acid sampling and testing. If the result is negative, the green code will be automatically restored. In addition, it is worth mentioning that if the health code turns yellow, it will not be forced to isolate 14 days, but it must cooperate with the epidemic prevention and control work of relevant departments.