Kangdukwon Founders History of Kang Duk Won TaeKwonDo Kangdukwon cohorts in 1958 Master Yoon Byung-In’s Legacy: The Changmoo-Kwan and Kangduk-Won by Robert McLainThe Life of Great Grandmaster Yoon Byung-in GM Hwa Chong and GM Park Dong Gun at GM Kim Byung Soo’s dojang in the early 1960s. Kangdukwon senior instructors in Michigan, ca. 1970 Left to right: Grand Masters Sung-won Chi, Park Chul-Hee, and Kim Soo