The standard weight of a boy is 33.74kg for 140cm, and that of a girl is 31.76kg for 140cm. The standard weight of a child corresponds to the height of the child, and within one standard deviation, it is considered to be generally normal, and does not belong to obesity. If the child’s weight ≥ 20% of the standard weight or weight ≤ 20% of the standard weight belongs to wasting or obesity, in order to ensure that the standard height and weight, in daily life should be balanced, reasonable diet, avoid partiality and picky eating, to ensure that a reasonable, adequate nutritional intake, while daily to ensure appropriate physical activities, such as bouncing class or running are available. All are conducive to the child to maintain a normal weight. Ensuring sufficient sleep every day is conducive to the maintenance of the child’s height and weight.