Seong Nak-gun
He went on to Dong-a University , and while a student there represented South Korea at the 1980 Juniors Track World Championships and the 1983 Asian Athletics Championships . 
<triplet> 1980 Juniors Track World Championships <subj> 1980 <obj> point in time <triplet> 1983 Asian Athletics Championships <subj> 1983 <obj> point in time