Original sentence: Although the art essentially vanished, some aspects of taekkyeon may have survived through underground teaching and folk custom.As the Japanese colonization established a firm foothold in Korea, the few Koreans who were able to attend Japanese universities were exposed to Okinawan and Japanese martial arts, and some received black belts in these arts.During the Japanese occupation (1910-1945), the practice of tae-kyon was banned.It is also regarded as the world's most popular martial art in terms of number of practitioners, and sparring, or kyeorugi, is an official Olympic sporting event.Koreans in China were also exposed to Chinese martial arts
Edited sentence: It is an official Olympic sporting event