Jiajun Xu (Member IEEE) was born in Taizhou City, Jiangsu Province, China in 1993. He received the B.S. degree in mechanical engineering from Hefei University of Technology in 2016 and the Ph.D. degree from University of Science and Technology of China and City University of Hong Kong concurrently in 2021. After that, he joined Nanjing University of Aeronautics and Astronautics and is currently an assistant professor in College of Mechanical and Electrical Engineering. His research interest includes rehabilitation robotics, biomimetic robotics, human-robot interaction control and machine learning. He has published many papers and patents in these fields.