Formula 17 (Shí Qi Suì De Tian Kong) is a 2004 film which was directed by Chen Yin-jung and stars Tony Yang, Duncan Lai, King Chin, Dada Ji, Jimmy Yang, and Jason Chang. This movie was Taiwan's highest grossing fiction film in 2004.
This gay romantic comedy revolves around a 17-year-old naive country boy, Zhou Tiancai (Tony Yang), who goes to Taipei in search for his dream lover. At a gay bar, he runs into his old high school friend, Yu (King Chin), who's a DJ there. At the bar, he meets the most chased gay bachelor in town (Duncan Lai) and falls for him. But Tian's "sisters" all advise him against this dangerous attraction, for Bai is a well-known playboy who is only into 'One Night Stands'.
