Health codes are divided into three colors: red, yellow and green, aiming at different groups of people.
"red team" personnel refer to those who need to take medical observation management such as no travel, concentration or home isolation.
Including people with positive nucleic acid test results, confirmed cases, asymptomatic infected people, suspected cases, close contacts, close contacts of close contacts, entry personnel, people who have lived in China's medium and high-risk areas in the past 14 days, and other high-risk groups who need emergency tracking and isolation management during the emergency response of the epidemic.