Tie quan (1979)

The story begins with the star Chen Kwan Tai's family being killed by Lau Kar Wing, Leung Kar Yan and Wilson Tong. During the fight that ensues, Chen loses a thumb in the battle and manages to escape and vows revenge. Enter Meng Fei. He's a scam artist of sorts, who fakes a relationship with Chen to thwart the crew of Lau, Leung and Tong. Action packed classic!