How many movies have Peng Yen-Lien and Robert Mak Tak-Law collaborated on?

They have worked on 9 movies together! Their first movie together was Crippled Avengers (1978) while their highest rated movie together was Kid with the Golden Arm (1979). They have not worked together since Opium and the Kung Fu Master (1984). They are most known for their action films together.