How long the health code turns yellow and green depends on the epidemic prevention and control regulations in various places. In some areas, two nucleic acid tests should be done within three days after the health code turns yellow, and the time interval between the two nucleic acid tests should be more than 24 hours. Only after the results of two nucleic acid tests are negative, the health code will turn green, and the time to turn green depends on the time when the last nucleic acid test results are issued.
The following are the specific steps to complain about the yellow code changing to green code: 1. Open the WeChat APP, then click the search bar at the top of the WeChat homepage above, click the official WeChat account option, and then enter the complaint applet. 2. After entering, click the service option. At this time, click "Red and Yellow Code Appeal", enter the identity information, and select "Yellow Code". 3. Upload the screenshot of the second nucleic acid test report made within 72 hours, and click Submit after uploading.