To restore your Lenovo tablet to factory settings, there are several methods you can try.
First, you can restore by going into your device's Settings menu. In your Lenovo tablet, open Settings and tap Backup & Reset. Next, find and click on the "Factory Reset" option on the interface. Finally confirm your selection and wait for the system to complete the recovery process.
Another method is to use the tablet's hardware button combination. With the phone turned off, press and hold the Volume Down key and Power key at the same time for a few seconds until the screen turns on. At this point, the device's "Recovery Mode" window will be entered. In this window, use the volume keys to move the cursor to the "wipe data/factory reset" option and press the power key to confirm. Then use the volume keys again to move the cursor to the "wipe cache partition" option, and press the power key to confirm the cache clearing operation. Finally, return to the main interface, select "Reboot System Now" and press the power button to restart the device.
Please note that you must back up your important data before performing any factory reset operations, as these operations will delete all user data and restore the device to its original state.
The above is a brief introduction on how to restore the Lenovo tablet to factory settings. I hope it will be helpful to you!