How many movies have Chu Yat-Hung and Lee Cheung collaborated on?

They have worked on 5 movies together! Their first movie together was Dirty Tiger, Crazy Frog (1978) while their highest rated movie together was The Thirty Million Dollar Rush (1987). They have not worked together since Aces Go Places V: The Terracotta Hit (1989). They are most known for their comedy films together.