Children from 0 to 12 years old are in a stable stage. Their feet bear the pressure of weight for a long time. In addition, the foot has thick fat to cover the arch of the foot, which increases the probability of foot disease. It is easy to form more obvious heel valgus, varus, flat foot, high arch foot and X-shaped leg. Professor Gong suggested that children in this period wear professional brand children's shoes to reduce the occurrence of foot disease.