Xiaomi bracelet 2 failed to synchronize. How to synchronize mi band?

Hello! 1, put it on your hand. When you need to view information, just turn on Bluetooth, refresh Xiaomi Sports APP, and you can synchronize it to your mobile phone for viewing. 2. If it cannot be refreshed for a long time, it may be that the Bluetooth connection data is abnormal, and it is recommended to re-link. 3. If it has not been solved, it is recommended to restart the bracelet pairing.