How many movies have Cheng Siu-Ping and Helina Chan Hay Lin acted in together?

They have worked on 1 movie together! Their first movie together was CID: Four Moments of Life (Dawn, Noon, Dusk, Night) (1976) and was their highest rated movie together. They have not worked together since CID: Four Moments of Life (Dawn, Noon, Dusk, Night) (1976).