First open the Alipay of the mobile phone and find the option of health code. You can choose from the card package or directly choose the health code. Open it first and then wait to jump out of the green horse. Then you can take a screenshot and cut it all out. If he can't do it for the elderly, he can ask his children to help you operate it and save it in an album. Then let the child teach you how to flip through the photo album.