Hello, painless! Orthodontics is a long-term systematic project. Attention should be paid to children's dental health and development from the deciduous period. Some serious deformities, such as malocclusion, should be treated at the early stage of deciduous teeth. Some serious skeletal deformities, such as maxillary protrusion, mandibular protrusion and jaw opening, need to be corrected early before puberty to block the development of malocclusion and guide the normal growth of teeth and jaws.