Personal resume: Li Youchang, male, born in February 1964, graduated from Chongqing Medical University with a master's degree. He began work in July 1988, and is currently a chief physician, a member of the Obstetrics Group of the Anesthesiology Branch of the Chinese Medical Association, a member of the Anesthesia Committee of the Chongqing Branch of the Chinese Medical Association, a member of the Pain Committee of the Chongqing Branch of the Chinese Medical Association, and the deputy director of the Anesthesiology and Pain Committee of the Chongqing Branch of the Chinese Association of Integrative Medicine.