How many movies have Huang Chiu-Kuei and Huang Mao-Shan collaborated on?

They have worked on 9 movies together! Their first movie together was 18 Shaolin Disciples (1975) while their highest rated movie together was Invincible Swordswoman (1977). They have not worked together since Commando Fury (1986). They are most known for their action films together.