1. If it is a close contact, after being given red team 2 1 day, the nucleic acid test is negative, and the green code can be changed (red team before 14 days, yellow code after 7 days).
2. If it is a close contact, after being red team for 7 days, the nucleic acid test is negative, and you can turn green code.
3. If the person in the sealed control area can turn to green code after unsealing, the specific transcoding time is determined according to the unsealing time.