The reason why the health code becomes gold and the health code becomes yellow.

1. If you have been active and stayed near the key places where confirmed cases and asymptomatic infected people have stayed, and you may have had contact with confirmed cases and asymptomatic infected people, your health code is listed in the yellow code.

2. People who enter and leave these key places after the critical period of confirmed cases and asymptomatic infected people will not be judged as yellow codes. The specific sites and dangerous time periods are determined by the office of COVID-19 Prevention and Control Headquarters of each relevant city according to the on-site epidemiological investigation.