Chief physician of the Child Health Care Department, specializing in monitoring and guidance for infant growth and development: including growth and development assessment and guidance for normal infants, correctional guidance for growth deviations (growth retardation, obesity, etc.), and assessment, consultation, and guidance for infants with developmental delays. Addressing infant feeding issues: such as guidance and treatment for feeding difficulties, poor appetite, picky eating and food preference, constipation, and spitting up; diagnosis and treatment of food allergic diseases; diagnosis and treatment of various nutritional imbalance diseases, such as rickets, micronutrient deficiencies, and iron deficiency anemia. Follow-up and early intervention for high-risk infants: early medical intervention, developmental assessment, and early training for newborns with high-risk factors at birth (such as premature infants, small-for-gestational-age infants, and those with various prenatal, intrapartum, and postpartum high-risk factors). Developmental assessment and early intellectual development guidance for normal infants.