When binding children's medical insurance e-cards, first prepare the household registration books of parents and children, and then download the "National Medical Insurance Service Platform" APP to activate parents' medical insurance e-cards through the "National Medical Insurance Service Platform" APP; First log in to the "National Medical Insurance Service Platform" APP and enter the main interface. You can click "My" in the lower right corner; Enter the "My" interface, click "Add my family members", fill in the relevant information according to the prompts and submit it.