Blood Brothers (Chinese: ; pinyin: Tin tng ku; literally "Gate of Heaven") is a 2007 Chinese film directed by Alexi Tan and starring Daniel Wu, Shu Qi, Liu Ye and Tony Yang.
It was co-produced by the Taiwanese production company CMC Entertainment, the mainland Chinese Sil-Metropole Organisation, Terence Chang's Lion Rock Productions and Hong Kong film director John Woo, and is Woo's first time as producer of another director's film. The film was shot entirely in the People's Republic of China.
Blood Brothers is Tan's directorial debut and deals with three friends who move from the countryside to 1930s Shanghai to work with the criminal underworld. In Shanghai, the friends become involved in a dangerous love triangle.
Blood Brothers was selected to close the 64th Venice International Film Festival on September 8, 2007.
The film should not be confused with The Warlords, a 2007 China/Hong Kong film starring Takeshi Kaneshiro, Andy Lau and Jet Li, that was at one point also called Blood Brothers.