How many movies have Cheung Bing-Chan and Mona Fong Yat-Wah collaborated on?

They have worked on 3 movies together! Their first movie together was Challenge of the Gamesters (1981) while their highest rated movie together was The Duel of the Century (1981). They have not worked together since What Price Honesty? (1981). They are most known for their action films together.