Professor Masahiro Ishii from Sophia University, Japan, Professor Koichiro Tezuka from Nihon University, Japan, and Professors Zheng Shiyuan and Dong Gang from Shanghai Maritime University, China visited our center from May 2 to 4, 2019. The director of the center, Professor Paul Taewoo Lee gave a warm welcome remark to the professors and Dr. Feng Xuehao briefly introduced Ocean College and the center. Dr. Hossein presented his recent studies on green maritime logistics and obtained insightful comments from the professors.