Prof. Yunlong Zi is in Department of Mechanical and Automation Engineering at the Chinese University of Hong Kong since 2017. Dr. Zi received his Ph.D. in Physics from Purdue University in 2014; his Bachelor of Engineering in Materials Science and Engineering from Tsinghua University in 2009. Before joining CUHK, he worked as a Postdoctoral Fellow at Georgia Institute of Technology during 2014-2017. His current research interests mainly focus on high-efficiency mechanical energy harvesting through triboelectric nanogenerators (TENG), triboelectric effect, discharge, tribo-photonics, TENG triggered high-voltage applications, and self-powered systems. As the 1st and corresponding author, his research studies have been published in top-notch journals. He was honored as the winner of MRS Postdoctoral Award by Materials Research Society in 2017, as the first recipient from Georgia Tech; Vebleo Fellow 2021; MINE Young Investigator Finalist in 2018; and one of 5 students who are transformation makers as highlighted in Purdue homepage in 2013. Hengyu Guo, Chongqing University. Jie Wang, Beijing Institute of Nanoenergy and Nanosystems (BINN), CAS. Chi Zhang, Beijing Institute of Nanoenergy and Nanosystems (BINN), CAS. Xiangyu Chen, Beijing Institute of Nanoenergy and Nanosystems (BINN), CAS.