Dr. Yong Hai is the professor and Chairman of the Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University of China. He obtained his MD degree in the First Medical University of PLA in Guangzhou, China in 1986. After finishing his fellowship training in Orthopedic Surgery and Spinal Surgery in the US at UMDNJ and SUNY for Orthopedic Surgery and Spinal Surgery in 1997, Dr. Hai has devoted his basic research and clinical practice in the field of spinal surgery. He is one of the leading KOL in the treatment of degenerative spinal disorders and complex spinal deformities, not only in China but also well known in the world. Dr. Hai has published over 300 peer-reviewed scientific articles and was the PI for many national and international research projects. He has contributed significantly in the field of spine care and won several research achievement awards. He is a member of many prestige international and domestic professional organizations such as SRS, ISSLS, NASS, SMISS, AOSpine, COA and served on the board or committees of those organizations. He is the vice president of the Chinese Association of Spine and Spinal Cord (CASSC), and the president of the Chinese Society for the Study of the Lumbar Spine (CSSLS).