It is the fourth forum to provide a platform for bringing together researchers, practitioners, and academia to present and discuss ideas, challenges and potential solutions on established or emerging topics related to research and practice in antennas, information technology and communication systems. The first forum ICEICT was successfully inaugurated by Harbin Institute of Technology and IEEE Harbin Section in Harbin in 2016. The second forum ICEICT was successfully inaugurated by Harbin Engineering University and IEEE Harbin Section in Harbin in 2019. The third forum ICEICT was successfully inaugurated by Shenzhen University and IEEE Harbin Section in November in 2020.