In the Yellow Emperor’s Classic of Internal Medicine, it is written, “Therefore, the sage does not treat the sick to treat the sick, and does not treat the chaos to treat the chaos.” “If a disease has been treated after it has become a disease, and a chaos has been treated after it has become a chaos, it is like thirst and piercing a well, and a bucket and casting an awl, it is not too late.” Only by paying attention to health, eliminating risk factors and promoting health can we effectively protect ourselves. With the improvement of people’s living standard, lifestyle and living environment in China, the growth and developmental dynamics and disease spectrum of children have changed greatly, and new health problems have emerged, such as lead poisoning in children caused by environmental pollution, nutritional disorders pediatric obesity, sleep disorders, psychological behavior problems, etc. are on the increase. Children’s health care, which was not taken seriously by some large general hospitals, is becoming an attractive fringe discipline. Children’s health care has two major tasks: health protection and health promotion. Focus on health Protection of children “Do babies need to see a doctor if they are not sick?” The answer is yes. Children are in a period of growth and development, especially infants grow so fast that indicators such as weight, height, intelligence and motor development are measured in months. The rapidly growing organism is fragile and vulnerable to diseases and bad environment due to immature organ functions and contradictory nutrition supply and demand. It is very important for children to have regular health checkups, monitor growth and development levels, have planned immunizations, and receive guidance on optimal parenting. In particular, children born prematurely or with diseases during the neonatal period are at greater risk of deviating from their normal growth and development, and must be monitored regularly and intervened early to form a “assessment-guidance-development-assessment” cycle between doctors, children and parents. “A cyclic, interactive, follow-up and personalized developmental model is formed between doctors, children and parents. Frequency of physical examination According to the requirements of health science, physical examination: less than 6 months of age, once a month; 6 ~ 12 months of age, once every 2 ~ 3 months; 1 ~ 3 years of age, once every 6 months; more than 3 years of age, once a year. Physical examination content 1. growth and development history, parenting history, etc. 2.Physical measurement and assessment: such as fontanelle, head circumference, weight/height, body mass index, adult height prediction, etc. 3.Physical examination of each system: such as cardiopulmonary auscultation, bone strength measurement, and audiovisual testing. 4.Developmental neurological examination: such as muscle tone, nerve reflex, posture, movement pattern, etc. 5.Developmental level assessment: such as neonatal behavioral neurological measurement, intelligence test, speech assessment, mental behavior assessment, etc. 6.Other: routine blood, vitamin D, thyroid function, blood and urine metabolism, chromosome, electrocardiogram, ultrasound, etc., if necessary.