U Kno

Jung Yun-ho (Korean: 정윤호; Hanja: 鄭允浩; born February 6, 1986), also known by his stage name U-Know Yunho (유노윤호) or simply U-Know, is a South Korean singer-songwriter, actor, and a member of the pop duo TVXQ. Born and raised in Gwangju, South Korea, Yunho started his musical training under the talent agency S.M. Entertainment in 2001 and joined TVXQ in 2003 as the band's leader. Fluent in Korean and Japanese, Yunho has released chart-topping albums throughout Asia as a member of TVXQ. He has made occasional acting appearances in television dramas.

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