According to the pass big data, if you have been to the sealed area 2 days before the onset of the case or 2 days before the asymptomatic infected person tested positive until the quarantine management, the health code may turn into a yellow code, and at this time you need to go to the nearest testing organization or hospital for 2 nucleic acid tests within 72 hours, and only if the 2 nucleic acid tests are negative then you can go back to normal. The only way to get back to normal is if both tests are negative.