The majority of the film's original score was composed by Raymond Wong and performed by the Hong Kong Chinese Orchestra.

[3] One of Wong's works, "Nothing Ventured, Nothing Gained" provides a stark contrast between the villainous Axe Gang and the peaceful neighbourhood of Pig Sty Alley, depicted by a Chinese folk song, "Fisherman’s Song of the East China Sea".

The song, "Zhi Yao Wei Ni Huo Yi Tian" (只要為你活一天; Only Want to Live One Day for You) was written by Liu Chia-Chang in the 1970s.

The Asian version of the soundtrack was released on 17 December 2004 by Sony Music and has 33 tracks.

[7] The American version of the soundtrack was released on 29 March 2005 by Varèse Sarabande and has 19 tracks.