'Gate of Heaven') is a 2007 Chinese film directed by Alexi Tan and starring Daniel Wu, Shu Qi, Sun Honglei, Liu Ye and Tony Yang.

Given Tan's overseas upbringing and lack of Mandarin speaking and writing ability (he was born in Manila and studied in London), the screenplay was originally written in English.

[8] Despite Tan's initial concerns that Jiang Dan would not understand the Leone or Peckinpah influences, he later felt that her contributions to the story helped flesh out the film's romantic elements and in particular expanded upon the feminine perspectives of Shu Qi's and Lulu Li's characters.

[10] The film should not be confused with The Warlords, a 2007 Hong Kong film/Chinese starring Jet Li, Andy Lau and Takeshi Kaneshiro, that was at one point also called Blood Brothers.

[12] In an interview with The Hollywood Reporter, producer Terence Chang reflected on the movie's under-performance in Taiwan and Hong Kong, calling it "extremely disappointing".