How many movies have Joseph Cheng King-Kei and Simon Lui Yu-Yeung acted in together?

They have worked on 4 movies together! Their first movie together was The Gods Must Be Funny in China (1994) while their highest rated movie together was SDU: Sex Duties Unit (2013). They have not worked together since SDU: Sex Duties Unit (2013). They are most known for their comedy films together.