How many movies have Lau Ching-Pang and Wan Seung-Lam collaborated on?

They have worked on 4 movies together! Their first movie together was Two Champions of Shaolin (1980) while their highest rated movie together was On the Wrong Track (1983). They have not worked together since Heroic Trio 2: Executioners (1993). They are most known for their drama films together.