How long does it take for primary school students to stay asleep to be healthy?

Primary school students should keep the best sleep for ten hours, and the sleep time should be fixed between 9: 00 pm and 10. Because primary school students are in a period of vigorous growth and development, their organs and tissues are not yet mature, their physiological functions are not perfect, and they are prone to fatigue. They should have more sleep time every day to meet the needs of good health. For primary school students, long-term lack of sleep will have an impact on their health, height and intelligence, so primary school students should keep enough sleep.