Cheng Kwong

A 1989 film.

Lam, a Taiwan gangster who flees to Hong Kong after killing a rival gangster. Hiding at his uncle gang boss Lip's place, he gets embroiled in more gang conflicts and is forced to be an informant for the police. Lam runs away to Guangzhou and Macau with Lip's mistress, causing an enraged Lip to be hot on his trail.