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Kim Chang Ok is a South Korean writer, YouTuber, vocalist, musical and theater actor, professional instructor, and entrepreneur from Jeju Island. He graduated from Hanlim Technical High School in Jeju Island and served as a signalman in the Republic of Korea Marine Corps. After he was discharged from the military at the age of 25, he entered the Department of Vocal Music at Kyunghee University. He debuted as a musical actor in 1999 and also served as an adjunct professor at Seoul Women's University.
