When the health code turns red, it needs to be tested at a nearby nucleic acid testing place and reported to the local neighborhood Committee. With the spread of COVID-19, some areas are now at greater risk of being infected with the virus, so having a health code can well reflect the basic situation of individuals. If the health code turns red, it means that you may pass through the epidemic area and have the risk of infection, so don't panic in advance, just go to the nearby nucleic acid testing place for testing and report to the local neighborhood Committee.