How many movies have Lau Kar-leung and Yeung Chun-Sing acted in together?

They have worked on 10 movies together! Their first movie together was The Killing Flag (Part 1) (1963) while their highest rated movie together was Return of the One-Armed Swordsman (1969). They have not worked together since The New One-Armed Swordsman (1971). They are most known for their action films together.