If you just pass through Shanghai, don't stay in the high school risk area, and don't contact with the confirmed cases, the health code will not change color.
Health code discoloration rule
1. Residents in fixed risk areas: residents in high risk areas are red, residents in medium risk areas are yellow, and residents in low risk areas are green.
2. Low-risk residents go to high-risk and medium-risk areas: those with green codes enter high-risk and medium-risk areas, wait 1 hour and the health code will automatically turn red and yellow after the mobile phone is turned on.
3. Medium-risk residents go to low-risk areas: From the arrival time, the first 2 1 day is yellow code, and after 2 1 day, the normal results of nucleic acid test are uploaded and turn green. Those who have not uploaded will always be in a yellow code state.
4. High-risk residents go to low-risk areas: from the arrival time, the first 14 days is red team, and the last 7 days are yellow codes. After 2 1 day, the normal results of nucleic acid detection were uploaded and turned green. Those who have not uploaded will always be in a yellow code state.
5. Overseas personnel: From the time of arrival, the code is yellow for the first 28 days, and after 28 days, the normal results of nucleic acid test are uploaded and turn green. Those who have not uploaded will always be in a yellow code state.
6. Diagnosed and suspected persons: The date of rehabilitation needs to be uploaded by the relevant units from the date of rehabilitation. The first 28 days are red team, and it will automatically turn green after 28 days. If the recovery date is less than, it will always be red team.