The primary areas of focus include pediatric gastrointestinal diseases, hepatobiliary and pancreatic diseases, nutrition-related disorders, and pediatric endoscopic diagnosis and treatment. The physician has extensive experience in the differential diagnosis and treatment of pediatric gastrointestinal symptoms, including vomiting, diarrhea, abdominal pain, loss of appetite, weight loss, gastrointestinal bleeding, jaundice, and abnormal liver function. In particular, he has achieved a high level of expertise in the diagnosis and treatment of complex pediatric gastrointestinal diseases, functional gastrointestinal disorders in children, food allergy-related gastrointestinal diseases, Helicobacter pylori infection in children, inflammatory bowel disease in children, inherited metabolic liver diseases in infants, and pediatric gastrointestinal endoscopy.