Dr. Yajing Shen received the B.S. and M.S. degrees in mechanical engineering from Xi’an Jiaotong University, China in 2005 and 2008, respectively. He received the Dr. Eng. degree in Micro-nano Systems Engineering, Nagoya University, Japan in 2012. Then, he was a postdoc researcher at Fukuda Lab. within the Dept. of Micro-nano Systems Engineering until March 2013. He is working as an associate professor now in the Department of Biomedical Engineering, City University of Hong Kong.