Parallel Ecology for Intelligent and Smart Cyber–Physical–Social Systems

Welcome to the last issue of IEEE Transactions on Computational Social Systems (TCSS) this year. This is also the last time I am serving as the Editor-in-Chief of this great journal, and I would like to take this opportunity to thank you all for your great help and support during the last three and half years. A special thank must go to my “Executive Editorial Task Force”: Professor Yong Yuan of People's University of China; Drs. Rui Qin, Xiao Wang, and Xueliang Zhao of The State Key Laboratory for Management and Control of Complex Systems, Institute of Automation, Chinese Academy of Sciences; and Dr. Juanjuan Li of Beijing Institute of Technology, for their hardworking and dedication within my term as EiC. We have rejuvenated TCSS in a very short period and maintained its state of healthy growth, and this is a great team I must remember and will be proud of.