Communication Big Data Travel Card is a free inquiry service provided by China Xintong Institute, China Telecom, China Mobile and China Unicom for 65.438+06 billion mobile phone users nationwide through the location of their mobile phones. Through this service, mobile phone users can query all the city information they have been to in the previous 654.38+04 days.
From 20: 30 on 202118, the city name of the medium-high risk area is no longer marked in red on the travel card, but is marked in brackets after the city name. Precautions are only used as travel tips and have nothing to do with health status. On March 30th, the national government service platform "Epidemic Prevention Health Code" has integrated the relevant information of "Communication Big Data Travel Card", which can show whether the user has been to medium and high risk areas and other travel information in the health code, helping the health code to be "one code pass".
relevant information
The query results show that the visited provinces and cities (domestic), countries and regions (international) and-* * * are divided into three cards: green, yellow and red, and the rules will be adjusted in real time according to the actual situation. Within the first 14 days of the user. The trip calculation was completed in the background of the operator, and the result was delayed by one day. For example, the travel data calculated on March 5th is before March 4th 14 days (between February 20th and March 4th).
In addition, because the service uses base station data, in order to ensure continuous communication and achieve no blind area coverage, the base station signals at the junction of administrative divisions may cross-cover, resulting in deviation of the results, so it can be adjusted according to other certificates. The query results page will be marked with four colors: green, yellow, orange and red, and the rules will be adjusted in real time according to the actual situation.