Medical research shows that the peak period of growth hormone secretion and the most active time of human epidermal cell metabolism are between 0-3 am. Not sleeping at this time is an act of inhibiting physical growth for children during their growth and development; Insomnia at this time will affect the speed of cell regeneration, leading to skin aging. The consequences of this horror will be directly reflected in the faces of ladies. If children want to grow taller and women want to keep their facial skin good, they must get into the habit of falling asleep around 22: 30, preferably at 0-3 am. As the old saying goes, "When a person is ugly, the eaves are three inches shorter", which means that at midnight 1-3 o'clock, everything is quiet, naturally quiet, and even the eaves hang down three inches lazily to "sleep", especially for people.