How many movies have Tai Chun-Ching and Tang Siu-Lam collaborated on?

They have worked on 3 movies together! Their first movie together was The Occupant (1984) while their highest rated movie together was It's a Mad, Mad, Mad World (1987). They have not worked together since Aces Go Places V: The Terracotta Hit (1989). They are most known for their comedy films together.