Scanning the travel code will show you information about where you have been in the last 14 days.

Communication big data itinerary card is by the China Academy of Information and Communication Technology in conjunction with China Telecom, China Mobile, China Unicom three basic telecommunications enterprises using cell phone "signaling data", through the user's cell phone is located in the base station location to obtain, for the country's 1.6 billion cell phone users free query service, cell phone users can use the service to query my previous 14 days to all the cities and towns information. Through the service, you can inquire about the information of all the cities and towns that you have visited in the previous 14 days.

From 20:30 on January 8, 2021, the trip card will no longer mark the names of cities and municipalities containing medium and high-risk areas in red, and will change to include medium and high-risk areas in the parentheses after the name of the city, with the note only serving as a travel reminder and not associated with health status. "has integrated" communication big data trip card "related information, can be displayed in the health code user.

Communication big data itinerary card use

Communication big data itinerary card analyzes cell phone signaling data", through the user's cell phone is located in the location of the base station to obtain, signaling data collection, transmission and processing process automation, there is strict The data of the "communication big data itinerary card" can be used nationwide.

The data can be used to provide comprehensive coverage of the entire country, as well as access to the international itineraries for my domestic cell phone number. Under the premise of ensuring user information security, these will provide scientific and accurate technical support for epidemic prevention and control, resumption of work and production, road traffic, immigration and other aspects.

Reference: Baidu Encyclopedia-Communication Big Data Trip Card