Zailing li is chief pediatrician of Peking University third hospital, deputy director of the department. She graduated from the medical department of Peking University in 1993. She has been working in the third Hospital of Peking University since graduation. During this period, she received specialized training in digestion for one year. Currently, she is the consultant of the digestive group of the 17th pediatric branch of the Chinese medical association, the leader of the allergic gastrointestinal disease cooperation group and deputy leader of the 11th Chinese medical association gastroenterology science group and so on. Her main research direction is children digestive system diseases and allergic diseases. She presided and participated in a number of national projects. She published more than 50 articles in core journals. Participated in writing more than 20 books.