What is card code double test?

Double test of card code refers to two tests of "communication big data travel card" and "health code", referred to as double test of card code.

Communication Big Data Travel Card is the "signaling data" of mobile phones launched by China ICT Institute, China Telecom, China Mobile and China Unicom.

Through the location of the base station where the user's mobile phone is located, it provides free inquiry service for 654.38+06 billion mobile phone users nationwide. Through this service, mobile phone users can query all the city information they have visited in the previous 654.38+04 days.

Health codes are based on actual data and can be generated by citizens or people who have returned to work through online declaration and background audit.

As an individual entering and leaving electronic certificate locally, the QR code can be declared once, which is universal in the whole city. The introduction of the health code aims to make the work of returning to work more accurate, scientific and orderly.

Main functions and processes of communication big data travel card;

The inquiry service of communication itinerary card is mainly for domestic mobile phone users, and it can inquire personal itinerary within the first 14 days at home and abroad, with accuracy to provinces and cities in China (staying for more than 4 hours) and accuracy to countries abroad.

The query is initiated by the user. You can use mobile phone software (WeChat, Alipay, etc. ) scan the code to enter the query page, or the WeChat applet can search for "communication travel card" to enter the applet, enter the mobile phone number and click to get the verification code. After the verification is successful, click Query to return the query result.

After verification, the system will synchronize the declaration information in the "Epidemic Prevention Health Information Code", which users can view on their own epidemic prevention health information details page. If the verification fails, it needs to be declared again.

After accessing this service, users can inquire and prove their places of visit in the past 14 days only by declaring their itinerary in the "Epidemic Prevention Health Information Code", without additional inquiry and proof.