How many movies have Lee Kui-On and Yuen Siu-Tien acted in together?

They have worked on 3 movies together! Their first movie together was The Sword and Knife (Conclusion) (1968) while their highest rated movie together was The One-armed Magic Nun (1969). They have not worked together since The One-armed Magic Nun (1969). They are most known for their action films together.