Reasonable living arrangement is very important: children can get enough outdoor activities, proper study, regular meals and sufficient sleep, which have a great effect on growth and development. This is because under a reasonable living arrangement, all parts of the body, including the brain, can get appropriate alternation of activities and rest, plus timely supplementation of nutrition to ensure normal energy metabolism, which is conducive to promoting the full development of all parts of the body. Many infants and toddlers who enter the nursery have more significant growth in height, weight and movement than those who stay at home because of their regular life and reasonable diet and nutrition. Some people have studied the changes of growth hormone concentration in blood during the day and found that the concentration of growth hormone is significantly higher at night, and the growth hormone released by the endocrine system is much more at night than during the day. Therefore, it is necessary to ensure that children and adolescents get enough sleep to promote height.