How many movies have Mao Ching-Shun and Stanley Chow Fook-Leung collaborated on?

They have worked on 3 movies together! Their first movie together was Black Hornet (1977) while their highest rated movie together was Snake and Crane Arts of Shaolin (1978). They have not worked together since Shaolin Ex-Monk (1978). They are most known for their action films together.