How many movies have File Ip Kwok-Wing and Mona Fong Yat-Wah collaborated on?

They have worked on 7 movies together! Their first movie together was The Emperor and His Brother (1981) while their highest rated movie together was The Duel of the Century (1981). They have not worked together since The Hidden Power of the Dragon Sabre (1984). They are most known for their action films together.