.ICCCS as an IEEE conference from 2015-2021, which was born in Kanyakumari, India aiming to serve as a premier forum for the presentation of technological advances and research results in the fields of theoretical, experimental, and applied Computer and Communication Systems.The second edition ICCCS was held in Kracow, Poland in July of 2017. The third edition was held in Nagoya Institute of Technology, Nagoya, Japan in April of 2018, and the fourth edition was held in Singapore in February of 2019. In 2020, due to the severe impact of COVID-19, ICCCS2020 became the first virtual conference, which created a web platform for all the authors to attend all the sessions and activities. Even in such a difficult time, around 250 authors still attended the whole conference full of passion. As the situation got better in 2021, ICCCS2021 was successfully held onsite in Chengdu, at the same time, the remote way for online participation was also offered to ensure attendees from all over the world could be involved.