Xu Sun received his Bachelor’s, Master's and Doctoral degrees from Nanjing University in 2002, 2004 and 2007, respectively. Since 2007, he has been practicing as a spine physician in the Department of Orthopedics at Nanjing Drum Tower Hospital, the Affiliated Hospital of Medical School of Nanjing University. In 2017, he spent six months on a Visiting Research Scholarship at Columbia University. In 2019, he was promoted to a Chief Spine Surgeon. In 2021, he was appointed as a part-time professor at the Medical School of Nanjing University. His research interests focus on both basic and clinical research on intervertebral disc degeneration, bone metabolism, spine deformity, and osteoporosis.