My mother didn't come into contact with any previous codes in the countryside. What should I do if they turn yellow?

This situation may be caused by cell phone signal positioning error.

Possible reasons why the health code turns yellow:

1. Abnormal health: those with fever, shortness of breath and respiratory symptoms.

2. Returnees from other places: those who need to be quarantined at home for 14 days, except those returning from key epidemic areas.

3. Other personnel who need to be included in the yellow code management.

4. Abnormal cell phone positioning or signal, mostly at the regional junction.