This means that your ipad is locked. If you use your own account, the password may be leaked.

Unlocking step

Log on to Apple official website to download itunes, install it and open it.

Connect the iPad to the computer with a data cable.

Please press and hold the power button on the top of the ipad, and then slide to turn it off after the shutdown interface appears.

Then, press and hold the power button to start the machine. At this time, Apple's logo will appear on the screen. Do not release the power button.

Then press and hold the home button on the home screen until the screen turns black.

When the screen is black, please release the power button, and don't release the Home button of the home screen until iTunes on the computer detects that an iPad is in recovery mode.

Press and hold the "shift" key on the keyboard, click "Restore" and select the corresponding firmware recovery system.