Dear ALL, Due to that the previous conference management side has stopped its service to DIKW2021, the previous conference name DIKW-RA 2021 and web site https://dikwra.org/ are abolished. Please kindly move your submissions to our new DIKW2021 conference site： http://www.ieee-cybermatics.org/2021/dikw/ We are very sorry for all the inconveniences during this transferring process. Thanks deeply again for your patience and continued support. Looking forward to seeing you at Haikou city or online instead. Sincerely, Chairs of DIKW2021