Jung Yun-ho, also known by his stage name U-Know Yunho 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.
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