The validity period is still relatively short. So if you have the conditions, you'd better show your electronic code. If there are no conditions, you'd better print it out before going out.
The QR code is equivalent to a business card. The information on this business card is always there, such as phone number and company website, but if the phone on the business card is down, then you can't get through by scanning the QR code. Similarly, if the company website on the business card is closed, scanning the QR code will prompt that the URL does not exist. Therefore, don't think that the content in the QR code will always be there.
Isolated red and yellow codes:
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 isolated red and yellow code personnel are not allowed to go out, and one person is in one room during the isolation period. Citizens and friends who find this kind of thing can report to the local county epidemic prevention and control headquarters (12345 government service convenience hotline, public security 1 10 for novel coronavirus epidemic prevention and control clues collection and acceptance telephone). At the same time, from March 20th, Loudi COVID-19 epidemic prevention and control work headquarters issued a notice about collecting clues to reward COVID-19 epidemic prevention and control, collecting clues from the masses, and rewarding clue providers as appropriate.