Third, find out what the content is.

3. Inquiries: Check the health code, check the travel itinerary code, check the body temperature, ask about the residence history, and whether you have been to the risk area. Obtain the trip code through the location of the base station where the user's mobile phone is located, and provide free inquiry service for 65.438+600 million mobile phone users nationwide. Mobile phone users can query all the city information they have visited in the previous 654.38+0.4 days through this service.

Travel code: Travel code is the code of communication big data travel card, which is also equivalent to health code. It is the data received by China Xintong Institute, China Telecom, China Mobile and China Unicom using mobile phones, which is obtained through the location of the base station where the users' mobile phones are 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.