What do you mean that big data display is already in the middle and high risk area?

Big data shows that the user was in a medium-high risk area, which means that the communication big data travel card can judge that the user was in a medium-high risk area or city of COVID-19 epidemic by analyzing the signaling data of the mobile phone and the location of the base station where the user's mobile phone is located.

This kind of big data travel card marked "Have been to medium and high risk areas" does not necessarily mean that users have actually been to medium and high risk areas. Specifically, for example, two base stations or users at the junction of administrative divisions live near the city boundary. When the corresponding city is marked as medium-high risk, another user can also be displayed in the medium-high risk area.

Communication Big Data Travel Card was jointly launched by China ICT Institute, China Telecom, China Mobile and China Unicom. It mainly provides the travel trajectory query service for the location of the base station where the mobile phone users are located, and provides corresponding management basis for the prevention and control of epidemic situation in COVID-19.

Development and change of big data travel card;

Since 2020 1 and February 2020 13, the SMS inquiry services provided by the three major operators have covered more than 200 million users.

2. As of March 25th, 2020, the cumulative number of inquiries has exceeded 450 million.

3 3. 10/From 202 1 65438+20: 30 on October 8, the travel card will no longer mark the city name of the medium-high risk area in red, but mark the medium-high risk area in brackets after the city name. Precautions are only used as travel tips and have nothing to do with health status.

In September, 20021year, in order to help people travel safely, the national government service platform integrated the health code and travel code into one page, and opened Alipay's health code to see the travel code at the same time.

Refer to the above? Baidu Encyclopedia-Communication Big Data Travel Card