"Two codes and one certificate", i.e., personal health code, big data pass code, and proof of negative nucleic acid test within 48 hours.

Preventive health information code service description:

* This service relies on the national government service platform unified identity authentication system, unified electronic license system, using the convergence of health, civil aviation, railroads and other aspects of the data, to provide the public with my preventive health information related to the query service.

* Users authenticated by their real names can view their own epidemic prevention and health-related information tips (e.g., whether it is a confirmed or suspected patient of the new Crown Pneumonia, whether it is a peer close contacts, etc.), and, with their authorization, they can also be provided to the relevant parties to use the mobile end of the National Government Service Platform (applets, APPs) to sweep and carry out the check.

Communication itinerary card query service is mainly for Chinese cell phone users, able to query personal domestic and international trips within the first 14 days, accurate to the provinces and cities in the country (stay more than 4 hours), and accurate to the country abroad. The query is initiated by the user, and can be accessed by scanning the query page with cell phone software (WeChat, Alipay, etc.), or by searching for "Communication Travel Card" in WeChat's small program, entering the small program, entering the cell phone number and clicking on it to obtain the verification code, and then clicking on the query after the verification is successfully completed, in which case the query results can be returned.

The query results show the provinces and cities visited (domestic), countries and regions (international), a **** is divided into three kinds of cards: green, yellow and red, and the rules will be adjusted in real time according to the actual situation. The calculation of the user's trips within the first 14 days is completed in the operator's back office, with a one-day delay in the results, for example, on March 5, the calculation is based on the data of the trips made within the 14 days prior to 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 from two base stations at the junction of administrative divisions may be cross-covered, resulting in deviations in the results, which can be used in conjunction with other proofs to make adjustments accordingly.

Communication big data trip card application process

The first step is to click on WeChat's bottom of the "I" - "Payment"; then click on the "city services

The second step is to slide down the page and click on "Trip Inquiry" under "Anti-epidemic Services"

The third step is to select "Epidemic Prevention and Control". Proof of Trip"

Step 4, select "Epidemic Prevention and Control Trip Card"

Step 5, enter your cell phone number, verification code, and check the box to agree to authorize the query, and then click on "Query" to obtain the communication trip card after checking the information is correct.