Chui Man-kin (徐文健, born May 16, 1983), better known as Chui Tien-you (徐天佑) or Tien You or "TY", is a Hong Kong actor, singer, writer and director. Early life Chui was invited by director Fruit Chan for a beverage commercial shooting in 1998, when he was studying secondary school. He then signed a management contract and made his debut in Chan's Little Cheung as a guest actor. Acting career Following secondary school graduation in Hong Kong and a half-year further education in Tokyo Japan, Chui began his onscreen acting career in 2000 in Lawrence Au Mon's film "Gimme, Gimme” and Lau Miu Suet's Glass Tears. Glass Tears entered the Cannes Film Festival 2001 where Chui celebrated his 18th birthday in Cannes. Chui appeared in several films for instance Summer Breeze of Love and Sound of Colors by Joe Ma, and The Mummy, Aged 19 by Wilson Yip. He played a supporting role as a director in Pang Ho-cheung’s A.V. in 2005. He starred as the grown-up son and attracted the most attention in Patrick Tam’s After This Our Exile. In the movie Magic Boy by Adam Wong and La Lingerie by Chan Hing-kai and Janet Chun, Chui’s sentimental roles brought him many compliments from film critics. He was then awarded the 2008 Rising Star in the 13th Pusan International Film Festival in Korea. Chui became known to Southeast Asian audiences when he collaborated with Malaysian director Yuhang Ho in the movie At the End of Daybreak, which won the Asian Film Award in 2009 Locarno International Film Festival and 2009 Hong Kong Asian Film Festival closing film. In this breakthrough role, Chui portrayed a teenager who is psychological imbalanced, which caught international attention. In 2010, after rounds of audition, Chui was offered an important role in Contagion directed by the Academy Award-winning film Director Steven Soderbergh. This was also his debut appearance in a Hollywood film, released in 2011. Chui played a leading role in ViuTV television drama series Leap Day by Steve Law in 2020 and composed and sang the song "Sei nin yat yu" for the series. Filmography Little Cheung (2000) Glass Tears (2000) Gimme, Gimme (2001) Summer Breeze of Love (2002) Treasure Planet (2002) The Mummy Age 19 (2002) Sound of Colors (2003) Himalaya Singh (2004) A.V. (2005) The Haunted School (2007) After This Our Exile (2007) Magic Boy (2007) Tactical Unit-Partners (2008) La Lingerie (2008) At