How many movies have Billy Lau and Joanna Chan Pui-San acted in together?

They have worked on 7 movies together! Their first movie together was The Inspector Wears Skirts (1988) while their highest rated movie together was Miracles: The Canton Godfather (1989). They have not worked together since The Inspector Wears Skirts IV (1992). They are most known for their comedy films together.