CChihye k'iugiChihye k'iugide Chin-myŏng Han, Kwang-nam Han, Hyŏng-hŭi Im, Ch'ŏr-hyŏk Pyŏn, Chŏng-nan Yun, Ch'un-ok KangMateriasEducational gamesJuvenile literatureGames in mathematics educationWisdomConduct of lifeComic books, strips