Welcome to join in the 2020 9th International Conference on Knowledge Discovery (ICKD 2020), which will be held in City University of Macau, Macau during November 21-23, 2020. For papers submitted to ICKD 2020, we offer the publications as following: 1. Publication in IJKE. Submissions will be reviewed by the conference committees and IJKE Editorial Board, and accepted papers will be published in International Journal of Knowledge Engineering, which will be indexed by Google Scholar, Crossref, ProQuest, etc. 2. Publication in IJMLC. Submissions will be reviewed by the conference committees and IJMLC Editorial Board, and accepted papers will be published in International Journal of Machine Learning and Computing, which will be indexed by Google Scholar, Crossref, ProQuest, EI (INSPEC, IET), Scopus, etc. There are two methods for submitting your paper: 1. By Electronic Submission System: http://confsys.iconf.org/conference/ickd2020 2. By Contact Email: ickd@iacsitp.com Please feel free contact with us: Mia Hu (Conference Secretary) E-mail: ickd@iacsitp.com Tel: +86-28-86512185 For more information about international conferences, please visit our conference website: ICKD 2020 website: http://www.ickd.org/