Beijing Intestinal Hospital (Beijing Erlong Road Hospital) is the largest third-class first-class integrated Chinese and Western medicine hospital in China, which is characterized by the diagnosis and treatment of various complex, difficult and severe intestinal diseases. Founded in 1937, the hospital has a total construction area of 26,800 square meters, 400 open beds, 18 clinical departments and 14 medical departments, with an annual outpatient volume of 700,000 and more than 13,000 operations. 21 brand self-made preparations with independent intellectual property rights have been used clinically for more than 50 years, serving nearly 10 million patients.