Xianyang Hospital of Yan 'an University (formerly China Railway 20th Bureau Central Hospital), founded in 1949 and formerly known as China People's Liberation Army Battlefield Hospital, is the largest third-class general hospital integrating medical treatment, teaching, scientific research, prevention, health care and rehabilitation in China. The hospital is the third affiliated hospital of Medical College of Yan 'an University, the national drug clinical trial institution, the standardized training base for residents in Shaanxi Province, the joint training base for master students of Yan 'an University, xianyang Cardiovascular and Cerebrovascular Hospital, Public Security Forensic Trauma Hospital, the medical insurance co-management in some counties of Shaanxi Province, Xi City, Xianyang City, Tongchuan City and Gansu Province, Qingyang Medical Insurance, the designated hospitals for inter-provincial settlement and the designated hospitals of major commercial insurance companies.