Ding Yu, MD & PHD, chief physician, professor, orthopaedic surgeon. He is currently the director of the Pain & Rehabilitation Medicine Department,The  Sixth Medical Center  of  PLA General Hospital. He is also the consulting doctor of the Minimally Invasive Spine Center, and the deputy director of the Surgery Staff Room in hospital. Dr. Ding is now the visiting professor at Desert Spinal Surgery Center in Phoenix, and class A faculty member of the Second Military Medical University in Shanghai. He served as the graduate tutor in orthopaedics and rehabilitation.