Category III: People who have been to areas with high epidemic risk or related personnel, if they are in Beijing, please report to communities, villages, hotels or units (schools, factories, construction sites, yards, etc.) immediately. Where I live, the relevant departments will conduct risk investigation. If there is no relevant risk, the "pop-up window" status can be released (the "pop-up window" cannot be automatically released through its own nucleic acid detection). If it is not reported in time, the "pop-up window" cannot be lifted until the relevant epidemic risk is effectively controlled or the subsequent traffic data can eliminate the associated risk.
Category IV: Persons who have not completed the nucleic acid detection within the specified time.