That’s Factory Reset Protection asking for the last Google account password used on the device. Not a screen lock password.
again. The tablet will restart and begin the wiping process. Teclast Official Website Important Precautions How to Hard Reset TECLAST P50S
If your TECLAST P50S is frozen, stuck in a boot loop, or you can’t access Settings, use . This method works even if the screen is unresponsive or you’ve forgotten the password. That’s Factory Reset Protection asking for the last
Don’t confuse a hard reset with a soft reset: stuck in a boot loop