Our self-developed assistive devices. (IMAGE) Beijing Institute of Technology Press Co., Ltd Caption (A) Assistive knee brace, (B) CUHK-EXO, (C) ankle-foot prosthesis, and (D) transfemoral prosthesis. Credit Ming Yin, State Key Laboratory of Digital Medical Engineering, School of Biomedical Engineering, Hainan University. Usage Restrictions News organizations may use or redistribute this image, with proper attribution, as part of news coverage of this paper only. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.