Introduction: Beijing Anding Hospital affiliated to Capital Medical University is located at No.5 Ankang Hutong outside Deshengmen, Xicheng District, Beijing, with a total area of 25,960 square meters. Founded in 1, 9 14 years. It is a tertiary specialized hospital integrating medical treatment, teaching, scientific research, prevention, social service and foreign exchange, and it is a designated hospital for medical insurance in Beijing.