1. School of Mechanical Engineering and Automation, Beihang University, Beijing, China.
2. Shenyuan Honors College, Beihang University, Beijing, China.
3. John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA.
4. Leitung Corporate Bionic Department, Festo SE & Co. KG, Germany.
5. Wyss Institute of Biologically Inspired Engineering, Harvard University, Cambridge, Massachusetts, USA.