Choi Chang-keun OC (Korean: 최창근; Hanja: 崔昌根; born 1941), widely known as C. K. Choi, is a South Korean–Canadian master of taekwondo,[1][2][3][4][5] and one of the twelve original masters of taekwondo of the Korea Taekwon-Do Association.
[6][7] Following a career in the South Korean military, Choi emigrated to Canada in 1969, where he continues to teach his martial art.
He began training in the martial arts in 1956, studying taekwondo and karate under instructors Hong and Kim in the South Korean army, and subsequently trained under Lim Woo-jong, Director of Taekwondo for the Korean 1st Army.
[4] In 1961, he helped Choi Hong-hi to create many of the present day Chang Hon patterns, Ge-Baek hyung.
[12] He continues to teach, conduct grading tests, give seminars, and offer assistance to those involved in taekwondo.