When passing Xi 'an by train, the travel code will not change. The trip code will only change after parking, and the parking time will take more than four hours. Travel code is the code of communication big data travel card, which is also equivalent to health code. It is based on actual real data, and citizens can generate personal QR codes through online declaration and background audit.
Color introduction of health code
Oasis-colored electronic health codes are normal, and red or yellow health codes need to be isolated before they can be turned back to green codes.
If you have been in or out of high-risk areas, or have been exposed to confirmed cases or suspected cases, as well as entry personnel, the health code will turn red.
If it is a person who has no close contact with the confirmed patient, a registered person in a fever clinic or a person who goes to a low-risk area from a medium-risk area, the health code will turn yellow.