Jeong Yonghwan liked drawing since he was a little kid, so Jeong kept drawing and creating pictures of everything and finally became a picture book illustrator. Jeong has worked on a number of picture books that deliver knowledge and information with a humorous and witty manner. Books illustrated by Jeong Yonghwan include Yoon Bong-gu the Human Clone 1,2, The Zoo Friends Are Being Weird, What Do I Do in This Situation?, The Complete Metamorphosis Picture Textbook.