Mi Dai forgot the screen lock password.

If you forget the screen lock password of mi band, you can try the following steps to reset the password:

1. Open the mi band App, click the "Me" tab, select "Bracelet Management", and start the Bracelet Settings page.

2. Click More Settings, and then click Manage Passwords. After entering the current password, enter the new password twice to complete the setting.

If you forget the current password, you need to send a password reset message through the App first. The specific steps are as follows:

1. Go to the "Me" tab of the App, select the "Bracelet" option, click "More Settings", and then select the "Manage Password" option.

2. Click "Forgot Password", enter the registered mobile phone number, click the Send SMS button, and reset the password according to the prompts in the SMS.

If all the above methods fail, you can consider restoring the bracelet to the factory settings. However, please note that after the factory settings are restored, all materials and settings will be deleted and need to be re-bound with the App. The specific steps are as follows:

1. Open the mi band App, click the Me tab, select the Bracelet option, click More Settings, and then select Restore Factory Settings.

2. Follow the instructions on the App to complete it in turn.

The above methods are for reference only. If the problem cannot be solved, it is recommended to consult Xiaomi's official customer service or related technicians.