"Communication Big Data Travel Card" is based on telecom big data, and the interface is provided by three major operators. Just fill in the mobile phone number and verification code and confirm my authorization. You don't need to fill in your ID number and home address, and you don't need to collect other personal information. The operation is simpler and safer, and the privacy of users is fully protected.
Corresponding to this is the communication big data travel card, including mobile, China Unicom and telecommunications. This data card is because China ICT Institute, together with China Telecom, China Mobile and China Unicom, uses the "signaling data" of the mobile phone to obtain the specific location through the location of the base station where the user's mobile phone is located.
Query result rules for communication travel cards:
1. 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.
2. Red card: COVID-19 confirmed or suspected patient.
3. Orange cards: close contacts of patients diagnosed or suspected in COVID-19.
4. China ICT Institute said that starting from 2002118 at 20: 30, the travel card will no longer be marked with the city names of medium and high-risk areas in red, but will include the medium and high-risk areas in brackets after the city names. The remarks are only used as travel tips and have nothing to do with health status.
Refer to the above? Baidu encyclopedia-communication travel card