How many movies have Alfred Cheung Kin-Ting and Lawrence Cheng Tan-Shui acted in together?

They have worked on 13 movies together! Their first movie together was Twinkle Twinkle Little Star (1983) while their highest rated movie together was The Bachelor's Swan Song (1989). They have not worked together since 77 Heartwarmings (2021). They are most known for their comedy films together.