How to power on, power off, and reboot the Xiaomi Watch S3?

The Xiaomi Watch S3 has two buttons on the right side, with the top one being the function button and the bottom one being the power button.
To power on, power off, and reboot your smartwatch, please refer to the following steps:
How to power on:
1. When the watch is off, press and hold the power button for 3 seconds to turn it on and go to the watch home screen.
How to power off:
1. While the watch is on, press and hold the power button for 3 seconds to enter the interface with [Reboot][Power off], and [Factory reset] options to tap [Power off];
2. While the watch is on, go to [Settings] >> [System] >> select [Power off].
How to reboot:
1. While the watch is on, press and hold the power button for 3 seconds to enter the interface with [Reboot], [Power off], and [Factory reset] options to select [Reboot];
2. While the watch is on, press and hold the power button for 12 seconds to force rebooting the watch;
3. While the watch is on, go to [Settings] >> [System] >> select [Restart].