How can a health code turn red for no reason?

The main reason why the health code turned red is that we passed some high-risk epidemic areas when the mobile phone was turned on, or because you may have had close contact with the confirmed patients in COVID-19 recently.

All these situations may turn our health code red. After the health code turns red, our travel will be restricted and we want to change it back.

Measures to turn health code red:

"red team": In-situ isolation, epidemiological investigation and disposal. "Yellow code": the nucleic acid test is negative, and the home health monitoring lasts for 14 days, and the nucleic acid test is carried out before and after the home health monitoring.

People who have lived in high-risk areas and closed control areas in China, as well as people who have lived in Nanjing Lukou Airport (by flight or transfer), will be quarantined 14 days after arriving in Loudi. After the expiration of the isolation period, they were monitored at home for 7 days and tested for nucleic acid regularly.