Jingzheng Ren, Ph.D., is an Assistant Professor at the Hong Kong Polytechnic University and an Honorary/Adjunct Associate Professor at the University of Southern Denmark. He has published more than 130 papers in SCI indexed international journals and authored/edited 7 books. Many of his papers have been selected as highly cited papers, have been highlighted by Renewable Energy Global Innovations/Advances in Engineering, or won the Best Paper Awards. Editor.

Zhipeng Kan, Ph.D., is Professor of Material Science and Engineering at the Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences. He has been published 45 times in international journals. Editor.