龍在邊緣 Century Of The Dragon 1990

Five years ago, Shing (Louis Koo), an outstanding trainee at the police academy, was hand-picked to go under cover in the Hung Hing triad. There, he became close friends with their toughest leader Fei Lung (Andy Lau). When territorial war breaks out between Fei Lung's buddy Leopard (Anthony Wong) and a rival gang led by Tall Guy, Shing comes into contact with White Head, another undercover cop. Soon, Shing is caught between the need to protect White Head, and his loyalty toward Fei Lung.