What should I do if the system upgrade of the Xiaomi Watch S3 fails?

1. If the [Mi fitness] App or device prompts that the upgrade fails, please try to reboot the device and then upgrade again;
2. Put the watch on the charger, and re-upgrade when the power of the watch is greater than 20%;
3. Reset the watch, pair it again, and try to upgrade again;
4. Try to change another mobile phone to re-bind and try to upgrade.
3. Unable to start up after the upgrade fails, please contact the after-sales service for processing.