Da feng bo (1974)

The doctor tells Chao that he has cancer and only months to live. So to help his girlfriend Su-An with her money troubles, Chao takes a job as an enforcer for a gangster and proceeds to drive the rival gang out of town. When you lose everything, there's nothing to slow you down. After Chao takes out the top hatchet man to save the women he loves, his doctor reveals that his initial diagnosis was mistaken. Chao does not have cancer.