How many movies have Lau Kar-Leung and Yu Kam-Lun collaborated on?

They have worked on 5 movies together! Their first movie together was Wong Fei-Hung Goes to a Birthday Party at Guanshan (1956) and was their highest rated movie together. They have not worked together since The Story of Wong Ang the Heroine (1960). They are most known for their action films together.