How many movies have Pauline Kwan and Richard Yuen collaborated on?

They have worked on 4 movies together! Their first movie together was It's a Mad, Mad, Mad World II (1988) 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.