As a sleep lover, I strongly oppose 8 hours of sleep. According to the opinion in the world, people divide the day into three. 8 hours of work. 8 hours of rest and 8 hours of sleep. Why so little? I think this should be adjusted. 8 hours of rest is enough. 8-hour work hours can be reduced to 6 hours. Instead, the sleep time can be increased to 10 hours.