Prison on Fire (1987)

Young and promising advertising designer Lu Jiayao (played by Tony Leung Ka Fai) accidentally injured someone while preventing undesirable elements from provoking trouble and was sentenced to three years in prison. In prison, he offended the gang boss because of his straightforward personality and was bullied. The old prisoner Zhong Tianzheng (played by Chow Yun-fat) couldn't help but help each other, and the two became friends in times of need.