Boxue Du, PhD, is Professor and Director-Founder of the Institute of High Voltage at the School of Electrical and Information Engineering, Tianjin University, Tianjin, China. He sits on the boards of numerous high-impact journals, including High Voltage, The Journal of Electronics and Advanced Electrical Engineering, and Insulation Materials and Electrical Engineering. He is a Fellow of the IET and a member of multiple standards committees in IEEE. Zhonglei Li, PhD, is Associate Professor at the Key Laboratory of Smart Grid of Education Ministry, School of Electrical and Information Engineering, Tianjin University, Tianjin, China. He has published widely on polypropylene cable insulation and related subjects, and he is a Member of IEEE.