How many movies have Elliot Ngok and John Chu Ka-Yan collaborated on?

They have worked on 3 movies together! Their first movie together was Intimate Confessions of a Chinese Courtesan (1972) while their highest rated movie together was The 14 Amazons (1972). They have not worked together since Trilogy of Swordsmanship (1972). They are most known for their action films together.