How many movies have Richard Ng Man-Tat and Tony Ching Siu-Tung collaborated on?

They have worked on 13 movies together! Their first movie together was A Better Tomorrow II (1987) while their highest rated movie together was A Chinese Odyssey Part Two: Cinderella (1995). They have not worked together since Kung Fu Dunk (2008). They are most known for their comedy films together.