He has been working in endoscopy for 30 years. He is proficient in the diagnosis and treatment of common gastrointestinal diseases, multi-morbidities, acute and critical diseases and intractable diseases. He specializes in diagnosis and treatment of gastrointestinal endoscopy and is experienced in early gastrointestinal cancer screening, daignosis and treatment of gastrointestinal bleeding, gastrointestinal adenoma and foreign body in the gastrointestinal tract. He has been the first to carry out the single-operator colonoscopy in the central and southern China and has completed tens of thousands of young and senior serious cases without bleeding and perforation. He also has performed endoscopic ligation of esophageal varices, sclerotherapy and tissue glue treatment, capsule endoscopy, magnifying endoscopy, dyeing endoscopy NBI and other techniques.