1. Open Xiaoai APP and click the "Me" button.
2. Find the "Settings" option, and then click Enter.
3. Find the "Account and Security" option on the settings page, and click Enter.
4. Find the "Screen Lock Password" option in the account and security page, and then click Enter.
5. Set the screen lock password according to the prompt, and confirm the password.
6. After setting the screen lock password, return to the main interface.