How many movies have Chiang Hsing-Lung and Lau Siu-Kwan collaborated on?

They have worked on 10 movies together! Their first movie together was Corpse Mania (1981) while their highest rated movie together was The Duel of the Century (1981). They have not worked together since Disciples of the 36th Chamber (1985). They are most known for their action films together.