How many movies have Cheng Ka-Sang and Lau Ching-Pang collaborated on?

They have worked on 3 movies together! Their first movie together was The Royal Scoundrel (1991) while their highest rated movie together was The Heroic Trio (1993). They have not worked together since Heroic Trio 2: Executioners (1993). They are most known for their comedy films together.