Why does it turn yellow in rural areas?

Mobile phone GPS positioning error, such as the positioning error at the junction of two provinces, but this situation is rare.

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.

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.