Why does the REDMI Watch 5 not record sleep?

Several factors will make the REDMI Watch 5 not record sleep, such as the amplitude of movement during sleep, inaccurate position of wearing the watch and insufficient sleep duration.
If the REDMI Watch 5 does not record sleep, please refer to the following details:
1. The REDMI Watch 5 will not detect sleep if there is a large range of movement during sleep;
2. The REDMI Watch 5 will not detect sleep in the bumpy status such as in the moving transportation;
3. Wearing the watch too loosely will result in the watch not fitting the skin of the arm during sleep, and it will be judged as not being worn;
4. If the sleep duration is less than 20 minutes, it will not be detected.