This book includes 70 selected papers from the Ninth International Conference on Fuzzy Information and Engineering (ICFIE) Satellite, which was held on December 26–30, 2018; and from the 9th International Conference on Fuzzy Information and Engineering (ICFIAE), which was held on February 13–15, 2019. The two conferences presented the latest research in the areas of fuzzy information and engineering, operational research and management, and their applications.                                                  

Cao is a second-class professor in Lingnan of Foshan University. Dean and professor of the School of Finance and Economics, Guangzhou Vocational and Technical University of Science and Technology, Guangzhou. Ph.D. student and postdoctoral tutor, School of Mathematics and Information Science, Guangzhou University, China. The President of the International Association's Fuzzy Information & Engineering (to be established), President of the Guangdong, Hong Kong and Macau Operations Research Society, and President of the Operations Research Society of Guangdong Province. Prof. Cao has pioneered geometric programming, published more than 180 papers, won 14 honors and awards, and successfully finished 12 scientific research projects. He serves as an editor-in-chief of Fuzzy Information & Engineering magazine and also as editorial boards of six international journals.