Can you find the itinerary by doing nucleic acid information?

Doing nucleic acid information will find out the itinerary.

Travel itinerary code records the location according to everyone's mobile roaming records. The rule that a card can have roaming records in different places is to make phone calls in the same place more than twice a day, with an interval of more than four hours.

If everyone's mobile phone is dual-card, then the two cards are in different locations. For example, one card is a home card and the other card is in a different place. If people are in different places and don't use their home cards, there may be a problem that the travel code can't find the travel data.

Brief introduction of trip code:

Travel code is the code of communication big data travel card, which is also equivalent to health code. China Institute of Information and Communication, together with China Telecom, China Mobile and China Unicom, used mobile phones to receive data, which was obtained through the location of the base station where the users' mobile phones were located, providing free inquiry service for the 654.38+06 billion mobile phone users nationwide. Mobile phone users can query all the city information they have been to before 654.38+04 days through this service.

One of the basic tasks of epidemic prevention and control is to trace the source, that is, to trace the source. We don't care about the quality of users or individuals, because the premise is that what can come out and circulate must be good, otherwise the relevant organizations or individuals will be responsible.