1. Open the know-it-all and enter the know-it-all page. Click the "My" button in the lower right corner to enter.
2. Click the Login button in the page that appears.
3. After the page jumps, enter the account number and password in the login interface and click Login.
4. Click the "Ankang Code" button to enter after the page jumps.
5. After the page jumps, you can see your own Ankang code, and click the switch button behind the name.
6. After clicking Switch, you can see the pop-up family members' names at the bottom of the page, and click the adult name and finish button. At this point, you can see that the Ankang code of the main interface has been switched to the child's.