How can an elderly person without a smart phone display a health code?

If the elderly don't have a smart phone, they can ask for help, and ask their family or friends to help them download and register their personal information in the application. Then, they can ask their family or friends to help them generate health codes in the application and show them to relevant personnel when necessary. In addition, some places also provide offline health code application services, and the elderly can go to local community service centers or government agencies to apply.