Welcome to join in the 2021 12th International Conference on Networking and Information Technology (ICNIT 2021)， which will be held in City University of Macau during November 27-29, 2021. For papers submitted to ICNIT 2021, we offer the publications as following: 1. Publication in Conference Proceedings. Submissions will be peer reviewed by conference committees, and accepted papers will be published in conference proceedings, which will be indexed by EI Compendex, Scopus, and other major databases. 2. Publication in JACN. Submissions will be reviewed by the conference committees and journal editorial board, and accepted papers will be published in Journal of Advances in Computer Networks, which will be indexed by EI (INSPEC, IET), ProQuest, Google Scholar, etc. 3. Publication in JCM. Submissions will be reviewed by the conference committees and journal editorial board, and accepted papers will be published in Journal of Communications, which will be indexed by SCOPUS; EBSCO; etc. There are two methods for submitting your paper: 1.By our electric system: https://cmt3.research.microsoft.com/ICNIT2021 2.By our contact email box: icnit@iacsitp.com Please feel free contact with us: Conference Secretary: Nina Lee E-mail: icnit@iacsitp.com Telephone: +86-28-86512185 For more information about international conferences, please visit our conference website: ICNIT 2021 website: http://www.icnit.org/