Dragon in Jail (1990)

Andy Lau stars as a juvenile delinquent trying to escape life in the ghetto. After releasing from jail, he is bullied by a local tyrant, Ma Chao-wei, at last his jail mates help him to settle the problem. However, Ma takes revenge on him. His friendship with a rich jail mate (Ho Kar King) is his only way out!
Kent Cheng
Andy Lau, Kenny Ho, Gigi Lai, William Ho Ka-Kui, Lung Fong, John Ching Tung, Shing Fu-On, Melvin Wong, Wong Hoi-Yan, Wai Gei-Shun, Law Shu-Kei, Gary Chan Ga-Fai
tt0100995