Step 1: If you want to add your child's health code, first open the Alipay app and click on the Health Code feature on the Alipay home page. Step 2: Click on View Now, enter the health code page and then slide the health code to the right, then click on the Apply for eHealth Card option. Step 3: Select children in the member relationship, then enter your name, ID number and cell phone number, and then click Finish to apply for the card.