First, open the mobile phone Alipay or WeChat software, search for the health code, click on Xi 'an's health code service, find the family agent after entering, and truthfully fill in the blank information on the pop-up page, including his (her) relationship with you, his (her) name, his (her) certificate type and so on, and then submit it. Alipay or WeChat will have the child's health code.