How many movies have Tom Lau Moon-Tong and Tony Ching Siu-Tung collaborated on?

They have worked on 6 movies together! Their first movie together was Rolls, Rolls, I Love You (1982) while their highest rated movie together was A Chinese Ghost Story (1987). They have not worked together since Dr. Wai in the Scripture with No Words (1996). They are most known for their action films together.