How many movies have Andy Lau Tak-Wah and Howard Sit Lap-Yin acted in together?

They have worked on 3 movies together! Their first movie together was 1:99 Shorts (2003) while their highest rated movie together was Wait 'Til You're Older (2005). They have not worked together since My Mother is a Belly Dancer (2006). They are most known for their drama films together.