Why did the health code turn red when I returned to Xiaochang from other places?

Xiaochang's health code turned red from other places because it came from high-risk areas at home or abroad. According to the relevant public information inquired, if the infected people from high-risk areas in China and overseas or COVID-19 have crossed the travel track in the same time period, the health code will be automatically transcoded. Depending on the exposure risk, the health code will be converted into yellow code or red team, with yellow code indicating the need for home isolation and red team indicating the need for centralized isolation.