Lù Hán (hanja: 鹿晗; hangul: 루한; born April 20, 1990 in Haidian) better known by mononym Luhan, is a Chinese singer. He was introduced as a member of EXO in December 2011, officially debuting in April 2012, and in October 2014, left the group after filing a lawsuit against S.M. Entertainment to reverse its exclusivity agreement.