Gastrointestinal diseases in children. Clinical nutrition. Gastrointestinal endoscopy in children.

Inflammatory bowel disease, helicobacter pylori infection, nutritional support of digestive diseases, rare diseases of digestive system.

Honorary Chair, Clinical Nutrition Group, Chinese Medical Association

Member, Medical Food and Enteral Nutrition Committee, Chinese Nutrition Society

Vice Chair, Pediatric Group, Chinese Society for Parenteral and Enteral Nutrition (CSPEN), Chinese Medical Association

Standing Member & Vice Chair, Pediatric Group, Society of Microecology, Chinese Preventive Medicine Association

Member, Pediatric Clinical and Health Branch & Chair, Gastroenterology Group, Chinese Society of Birth Health

Expert, Pediatric Gastrointestinal Endoscopy Working Group, National Health Commission (formerly Ministry of Health)