Some time ago, a newly released survey showed that more than 80% of primary and secondary school students in my country do not meet the standard sleep duration. The secret to a clear mind is deep sleep! The report shows that the average sleep duration of teenagers in 2020 is 7.8 hours, 0.3 hours lower than in 2009, and the phenomenon of insufficient sleep among teenagers continues to worsen. 95.5% of primary school students get less than 10 hours of sleep a day…