How many movies have Ken Lok Tat-Wah and Ronny Ching Siu-Lung acted in together?

They have worked on 4 movies together! Their first movie together was The Real Me (1991) while their highest rated movie together was The Mouse and the Cat: Nine Ghosts Blood Wolf (2021). They have not worked together since The Mouse and the Cat: Nine Ghosts Blood Wolf (2021). They are most known for their comedy films together.