How to reset the Xiaomi Smart Electric Toothbrush T501?

To reset the toothbrush, please refer to the following information:
1. Press the Power Button for more than 12 seconds, then the toothbrush will return to the default settings and the APP settings will be cleared, but the APP connection will be retained;
2. Press the Power Button and the Mode Button for more than 7 seconds at the same time, then the toothbrush will return to the default settings, and both the APP connection and APP settings will be cleared.