How many movies have Ada Choi Siu-Fan and Jeffrey Lau Chun-wai collaborated on?

They have worked on 4 movies together! Their first movie together was A Chinese Odyssey Part One: Pandora's Box (1995) while their highest rated movie together was A Chinese Odyssey Part Two: Cinderella (1995). They have not worked together since Just Another Margin (2014). They are most known for their fantasy films together.