The trip code's trip is not recorded after 14 days. The query results show the provinces and cities visited (domestic), countries and regions (international), -*** is divided into green, yellow, red three kinds of cards, the rules will be adjusted in real time according to the actual situation. Users within the first 14 days.

The trip calculation is done in the operator's back office, and the results have a -day delay, for example, on March 5 the calculation is for trip data within 14 days before March 4 (between February 20 and March 4). In addition, since the service uses base station data, in order to ensure continuous communication and achieve coverage without blind spots, the signals of two base stations at the junction of administrative divisions may be cross-covered, resulting in deviation of the results, which can be adjusted accordingly when using the service in conjunction with other proofs.

The significance of the role of the trip code:

Communication big data to support the epidemic prevention and control into the 2.0 stage, "digital war epidemic" play a major role. We fully promote the upgrading of the communication big data platform 2.0, give full play to the leading role of regional coordination and investigation, and analyze and send out all kinds of regional coordination and investigation data of more than 67 million items in the first time, which helps to win the battle of prevention and control of epidemics across the country. The optimization and upgrading of the "communication itinerary card" service has resulted in a total of more than 25 billion inquiries, which greatly facilitates people's daily travel and production life.

The Ministry of Industry and Information Technology (MIIT) also said that the simultaneous promotion of service quality improvement and user rights and interests protection, information and communication services for people's livelihoods to go deeper and deeper, the potential of digital benefits released. Vigorously enhance the level of 5G services, and actively create a consumer environment of user satisfaction. We have also pushed forward the special rectification of APP infringement of users' rights and interests and spam, completed the technical testing of 1.92 million APPs throughout the year, and reduced the number of spam user complaints to a historical low, so that the protection of users' rights and interests has been effectively strengthened.

Reference: Baidu Encyclopedia-Communication Big Data Trip Card