Put it on your hand. When you need to view information, just turn on Bluetooth and refresh Xiaomi Sports APP to synchronize it with your mobile phone. If it can't be refreshed for a long time, it may be that the Bluetooth connection data is abnormal, and it is recommended to re-link. If it has not been solved, it is recommended to restart the bracelet pairing. This should be a problem with Xiaomi Sports App. You can try disconnecting and reconnecting Bluetooth. Or synchronize it after a while to see if it is normal. Really can't. I can only unbind the bracelet and rebind it.