Changed the phone number, Min Zheng Tong's health password and her family's. You can see the switch health code button in the upper right corner of the health code interface. After entering the civil administration APP, click the Bamin health code on the home page to enter the health code interface. In the health code interface, you can see the switch health code button in the upper right corner. Click to enter the switching interface. You can see the health codes of yourself and your family in the switching page. Select the health code you want to use, and then click to switch.