What is the meaning of Qingdao One Code Tong reverse scanning code?

Qingdao one code pass reverse scanning code means:

1. The reverse code scanning function assigns an identity QR code to the elderly who don't have a mobile phone or can't operate a smart phone, and carries it with them. When entering a public place or taking public transportation, the staff in the place will take the initiative to scan the ID card carried by the elderly and change "I sweep you" to "you sweep me".

2. People only need to show their personal identity QR code cards for staff to scan, which effectively solves the code scanning problem of people who are inconvenient to use smart phones, such as the elderly.