Wechat applet binding, open Alipay software, search for "health code", click on the health code service of the local city, find "family agent" after entering, and truthfully fill in the blank information on the pop-up page, including the relationship between the child and you, the child's name, and the child's certificate type. Fill it out and submit it, and Alipay will have the child's health code.
After filling in the child's health code on Alipay, when you need to show your child's health code information when you go out, you can enter the "Health Code" page with "Switch Applicant" in the upper right corner. When you click it, it can easily switch to the interface of children's health code, so that children can have their own separate health code.