Why is the Great Wall in the middle of Hebei Health Code red?

The main reason why the health code turns red is that the health code will be transcoded automatically when it comes back from China and overseas high-risk areas, or when it has crossed with infected people in COVID-19 in the same time period. Depending on the exposure risk, the health code will become a red team, indicating that centralized isolation is needed. If the health code turns red, take protective measures first, report the trip to the local community, and then cooperate with community workers to conduct centralized isolation at the designated place.