Personal resume: Gao Yan, female, born in October 1962, graduated from Kunming Medical University and Sun Yat-sen University Zhongshan School of Medicine with a bachelor's degree and a master's degree. She started working in July 1984 and has studied at Beijing China-Japan Friendship Hospital and Peking Union Medical College Hospital. She is currently the chief physician, a member of the Chongqing Obstetric Quality Control Center, a training teacher for post-partum hemorrhage (national level) responsible for appropriate technical training in obstetrics, and a member of the postpartum hemorrhage research project in Chongqing.