How did the Changzhi yellow code become a green code on March 8, 2022?

It takes 7 days for the yellow code to change into the green code. The yellow code will be centralized or isolated at home for 7 days, and will be changed to green code after 7 days of continuous declaration of health punching. In order to ensure the accuracy of the status, I insist on entering the health code page to fill out the questionnaire every day. If you have been to an epidemic area, you need to be strictly isolated until it becomes a green code. If you haven't been to an epidemic area, you can give feedback by appealing.