Deadly Duo
Ah Cheng has decided to get out of this silly kung-fu business and retire with his new girlfriend. Unfortunately, everyone is out to kill him, and one of the killers has been using his trademark knives to frame him! Meanwhile his friends meet up with a mysterious swordsmen who is not what he seems.
Starring Angela Mao Ying, John Liu Chung-Liang, Leung Kar-yan, Man Kong-Lung, Shih Chung-Tien, Chan Sing, Chan San-Yat, Chiu Chun, Kwan Hung, Ching Kuo-Chung
Watch "Deadly Duo" on Amazon released in 1978. It's a drama and action & adventure movie, and has a rating of 6.1 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.