(English) Author Kim Yu-mi is currently the head professor of the Korean Education and Management Department at Seoul National University of Science and Technology (aSSIST). She co-wrote 『KBS Standard Korean 1-2 for Foreigners』, 『Enjoyable Korean Beginner/Intermediate 1-2 with Multicultural Families』, 『Precise Korean Beginner/Intermediate 1-2 with Multicultural Families』, 『Kyunghee University Korean 1-4』, and many more. Bae Se-eun is currently working as a Korean language instructor at Kyunghee University and other universities, while Lee Young-do is currently working as a Korean language instructor at Eo Won Academy.