How many movies have Kelly Chen and Leon Lai Ming acted in together?

They have worked on 5 movies together! Their first movie together was Infernal Affairs III (2003) while their highest rated movie together was 雷颂德THANK YOU演唱会 (2013). They have not worked together since 雷颂德THANK YOU演唱会 (2013). They are most known for their action films together.