Xiaomi Bracelet cannot be unlocked

1, my first time was to restart the Xiaomi phone.

2, there is a trick, to the millet bracelet charge.

3, Xiaomi bracelet cannot unlock

That's the trick.

Remove the Bluetooth device from the Xiaomi 4 phone and unlock it.

Settings, security and privacy, lock screen with password, Bluetooth device unlocked, device (encoding .....) ), remove the device

Re-bind again.

If at this time charging, but the hand ring lights out. Reseat.

Xiaomi Bracelet cannot be unlocked