1 9 6 0 , ▁Ch oi ▁had ▁att ained ▁the ▁rank ▁of ▁ 2 nd ▁dan ▁in ▁ta ek w ondo . ▁In ▁ 1 9 6 1 , ▁he ▁helped ▁Hong ▁Hi ▁Ch oi ▁to ▁create ▁many ▁of ▁the ▁present ▁day ▁Ch ang ▁Hon ▁patterns , ▁ ▁Ge - B a ek ▁hy ung . ▁ ▁In ▁ 1 9 6 2 , ▁W oo ▁promoted ▁Ch oi ▁to ▁the ▁rank ▁of ▁ 3 rd ▁dan . ▁That ▁same ▁year , ▁Ch oi ▁became ▁the ▁first ▁ta ek w ondo ▁world ▁champion ▁in ▁sp arring ▁and ▁patterns , ▁and ▁then ▁became ▁the ▁first ▁t ae ▁so o ▁do ▁world ▁champion ▁( full ▁contact , ▁heavy weight , ▁ 3 rd – 5 th ▁dan ▁division ) ▁in ▁ 1 9 6 3 . ▁He ▁later ▁became ▁one ▁of ▁the ▁twelve ▁original ▁master s ▁of ▁ta ek w ondo ▁and ▁taught ▁in ▁Malays ia . ▁Through ▁the ▁late ▁ 1 9 6 0 s ▁and ▁ 1 9 7 0 s , ▁Ch oi ▁was ▁a ▁key ▁member ▁of ▁the ▁ta ek w ondo ▁demonstr ation ▁teams ▁that ▁accompanied ▁H . ▁H . ▁Ch oi ▁around ▁the ▁world . ▁ ▁Canada ▁Ch oi ▁moved ▁to ▁V ancouver , ▁British ▁Columbia , ▁Canada , ▁in ▁ 1 9 6 9 . ▁He ▁opened ▁the ▁first ▁ta ek w ondo ▁school ▁there ▁in ▁ 1 9 7 0 . ▁He ▁also ▁established ▁the ▁University ▁of ▁British ▁Columbia ' s ▁ta ek w ondo ▁club