Can someone receive direct or indirect contact information driven by big data?

If something happens, it will be considered as intensive contact at this time, and it needs to be concentrated or isolated at home and reported to the district epidemic prevention office.

Close contacts refer to people who have close contact with the virus, suspected cases and confirmed cases, or who have not taken effective protection two days before the symptoms of asymptomatic infected people appear.

Including * * * the same resident, medical staff in medical activities that may produce aerogel environment, people who eat or entertain in a closed environment, people who have close contact in the same place, people who visit cases, other forms of direct contacts, such as the accompanying person of the case, nursing or peers who have close contact with the same vehicle (within 1 m), people who are in contact with the environment and articles contaminated by cases or asymptomatic infected people.