Lilly Li and Lau Kar-Wing vs. Fong Hak Onn and Chiang Tao "Big Mouth"
From one of the Lau Brothers' few independent (non-Shaw Brothers) film.
Li's husband/accomplice is Lau Kar-Wing, who is Gordon Liu's brother.
Gordon was adopted into the Lau fighting family. Fong Hak Onn was often
cast as a bad guy - notably in "Magnificent Butcher."