How many movies have Ailen Sit Chun-Wai and Mona Fong Yat-Wah collaborated on?

They have worked on 17 movies together! Their first movie together was The Flag of Iron (1980) while their highest rated movie together was Hong Kong Playboys (1983). They have not worked together since Disciples of the 36th Chamber (1985). They are most known for their action films together.