How many movies have Andrew Lau Wai-Keung and Jacky Cheung Hok-Yau collaborated on?

They have worked on 17 movies together! Their first movie together was Where's Officer Tuba? (1986) while their highest rated movie together was Days of Being Wild (1990). They have not worked together since From Vegas to Macau III (2016). They are most known for their comedy films together.