First, big data push is accompanied by people in open spaces, key places, and high-risk areas; Second, big data overflows and pushes the counties (cities, districts) where positive infected people are located; Third, there are people in cities with serious big data epidemics; Fourth, other epidemic-related risk personnel determined according to the needs of epidemic prevention and control in our province. The content of the pop-up prompt is: According to the big data push information (* * year * * month * * day), you may have a time-space intersection with infected people in COVID-19 recently or have a history of living in high-risk areas, and Hebei Health Code cannot confirm your health status for the time being. Please report to the residential community (village) or unit (hotel) immediately, cooperate with the performance of epidemic prevention obligations, and conduct nucleic acid testing as soon as possible. When the grass-roots investigation is completed and there is a designated negative test record, remove the pop-up prompt. If in doubt, please contact the local epidemic prevention office or call the government service hotline 12345. Thank you for your cooperation! According to reports, the provincial epidemic prevention office will adjust the scope of pop-up reminders in a timely manner according to the needs of epidemic prevention and control in our province.