How many movies have Angus Chan Siu-Hei and Louis Koo acted in together?

They have worked on 2 movies together! Their first movie together was Drug War (2012) and was their highest rated movie together. They have not worked together since Three (2016).

Role
Sun (Constable)
Role
Ken (Chief Inspector)
Role
Jinhai Anti-Drug Squad Member
Role
Timmy Choi