Is the place behind the itinerary code the latest?

Yes. Communication big data itinerary card, commonly known as "itinerary code". It is a query service provided free of charge to 1.6 billion mobile phone users across the country by China Information and Communications Technology Research Institute and three basic telecommunications companies, China Telecom, China Mobile and China Unicom, using mobile phone "signaling data" to obtain the base station location of the user's mobile phone. , mobile phone users can use the service to query information on all cities and towns they have visited in the past 14 days. According to the operation situation of querying the itinerary code, the itinerary code is updated at 0 o'clock every day, which is the latest place reached during the day. On March 30, the national government service platform "Epidemic Prevention Health Code" has integrated information related to the "Communication Big Data Travel Card", which can display the user's travel information such as whether they have been to medium- and high-risk areas in the health code, helping the health code "one code pass".