c. k. choi, j. c. kim, y. i. kong, j. s. park, and k. h. rhee have maintained the strongest links with the itf. h. h. choi had personally promoted c. k. choi to 8th "dan" (1981), y. i kong to 9th "dan" (1997), and k. h. rhee to 9th "dan" (1997).