How many movies have Dion Lam Dik-On and Ha Chi-Chun acted in together?

They have worked on 4 movies together! Their first movie together was Angel Enforcers (1989) while their highest rated movie together was Fist of Fury 1991 (1991). They have not worked together since Fist of Fury 1991 (1991). They are most known for their action films together.