Choi Chang-keun (Korean: 최창근; Hanja: 崔昌根; born 1941), widely known as C. K. Choi, is a South Korean–Canadian master of taekwondo, and one of the twelve original masters of taekwondo of the Korea Taekwon-Do Association. Following a career in the South Korean military, Choi emigrated to Canada in 1969, where he continues to teach his martial art.
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