Lifeline is a 1997 Cantonese-language Action Thriller film directed by Johnnie To and produced by Mona Fong under the banner of Cosmopolitan Film Productions. Following the lives of firefighters as they deal with joys and hardships, both on the job and with their own personal lives. Lifeline stars Sean Lau, Alex Fong, Carman Lee, Ching Wan Lau, Ruby Wong, Raymond Ho-yin Wong and Suet Lam. The screenplay is written by Yau Nai-hoi. The music was composed by Raymond Wong. Cinematography was done by Cheng Siu-Keung and editing by Wong Wing-ming. The film has a running time of 108 minutes. It was released on 3rd January 1997. The motion picture made a box office gross of $20 million. Distribution rights for the movie were acquired by Shaw Brothers Studio. Following the lives of firefighters as they deal with joys and hardships, both on the job and with their own personal lives.