 This being the last of the "pumsae" Taegeuk, it represents the end of the circle and the cyclic nature of the Earth.Schools that follow the International Taekwon-Do Federation (ITF) tradition typically use the Chang Hon 창헌 (also called Chang Hun, Chang 'On or Chon-Ji) forms that were developed by Choi Hong Hi, Nam Tae Hi, Han Cha Kyo, Choi Chang Keun, Park Won Ha, Woo Jae Lim, Kim Bok Man and Cho Sang Min, and have their roots in the Oh Do Kwan.In addition, Kim J.C., Park Jong Soo, and Lee Byung Moo are thought to have developed four of the Ch'ang Hon patterns (Eui-Am, Moon-Moo, Yong-Gae & So-San) in 1968.