How many movies have Fiona Sit Hoi-Kei and Ronald Cheng Chung-Kei acted in together?

They have worked on 5 movies together! Their first movie together was Vulgaria (2012) while their highest rated movie together was Two Wrongs Make a Right (2017). They have not worked together since Two Wrongs Make a Right (2017). They are most known for their comedy films together.