How to turn on the vibration reminder of mi band?

The guiding method of Mi band is as follows:

1 and mi band 32 are always on as long as there is electricity, as shown in the following figure:

2. However, it needs the support of mobile app to display its startup function, as shown in the following figure:

3. The bracelet will automatically turn off when it is out of power, as shown in the following figure:

4. At this time, just charge the bracelet, as shown in the figure below: