How many movies have Berg Ng and Francis Ng acted in together?

They have worked on 5 movies together! Their first movie together was Kidnap of Wong Chak Fai (1993) while their highest rated movie together was Infernal Affairs Trilogy (Chronological Edition) (2006). They have not worked together since Infernal Affairs Trilogy (Chronological Edition) (2006). They are most known for their thriller films together.