How many movies have Lau Kar-Leung and Yuen Siu-Tien acted in together?

They have worked on 13 movies together! Their first movie together was Wong Fei-Hung Goes to a Birthday Party at Guanshan (1956) while their highest rated movie together was The 36th Chamber of Shaolin (1978). They have not worked together since Heroes of the East (1978). They are most known for their action films together.