How many movies have Bill Tung and Lydia Shum Tin-Ha acted in together?

They have worked on 9 movies together! Their first movie together was It's a Mad, Mad, Mad World (1987) while their highest rated movie together was It's a Mad, Mad, Mad World Too (1992). They have not worked together since It's a Mad, Mad, Mad World Too (1992). They are most known for their comedy films together.