Sweeping the trip code is located through the cell phone.

Communication big data itinerary card analysis is the cell phone signaling data, through the user's cell phone is located in the location of the base station to obtain, to accurately locate their own driving through the track. General cell phone signaling location is through the base station to locate, and now the base station a **** have three major carriers in use, and these base station owners as well as managers are China Tower Company.

And the joint use of base station positioning and GPS can achieve high precision positioning, this high precision positioning is not open to the private third-party companies and the people, sometimes into the community management will scan some QR code or small program, scan in after entering the phone number for verification.

Development history

February 13, 2020, the epidemic prevention and control of the early stage, in order to facilitate the cell phone users do not go out of their homes, do not run more than the road, you can prove their own trip, the Ministry of Industry and Information Technology organized by the China Academy of Information and Communications Technology and the three major carriers **** with the launch of the public welfare applications dedicated to the prevention of the epidemic -

With the launch of a special public service application for epidemic prevention, the Ministry of Industry and Information Technology organized by the China Academy of Information Technology and the three major carriers *** with the "communication trip card".

With the continuous optimization of epidemic prevention and control measures, the "communication itinerary card" is constantly being improved to meet each new epidemic prevention task.

Starting at 00:00 on November 10, 2020, the "Communication Itinerary Card" will introduce the marking function for the first time. The names of cities and towns that contain medium- to high-risk areas will be marked in red, only as a travel reminder and not in relation to health status.

From 20:30 on January 8, 2021, the Communication Itinerary Card will no longer mark the names of cities and towns that contain medium- or high-risk areas in red, but will instead mark the names of cities and towns with an asterisk after the name of the city, with the asterisk indicating that a medium- or high-risk area exists in a city that the user has visited in the previous 14 days. The * (asterisk) indicates that the city is currently a medium or high risk area that the user has visited in the previous 14 days, and does not indicate that the user has actually visited these medium or high risk areas.

September 15, 2021, the national government service platform "epidemic prevention health code" has been integrated with the "communication big data itinerary card", health code, itinerary code in the country to fully realize the one-page-passing type of "two code". The two codes have been fully realized in the whole country in the form of one page.

On June 29, 2022, the Ministry of Industry and Information Technology (MIIT) announced the cancellation of the "asterisk" mark on the "communication itinerary card", and that the division of high-risk zones/medium-risk zones and the requirements for prevention and control and management would be more refined and precise, and the "asterisk" mark would be removed from the communication itinerary card. The "asterisk" marking of the communication itinerary card is difficult to play a role in the specific implementation of the new prevention and control strategy.

On July 8, 2022, the Ministry of Industry and Information Technology (MIIT) issued an announcement that the coverage time of the query results of the "communication itinerary card" would be adjusted from "14 days" to "7 days". The "communication big data itinerary card" use guide clearly puts forward the itinerary card can provide users with free proof of the country (region) that I have visited in the past 7 days and the domestic city where I have stayed for 4 consecutive hours.

At 0:00 on December 13, 2022, the "Communication Itinerary Card" service will be officially discontinued.