How many movies have Heo Myeong-haeng and Kim Hyung-seok collaborated on?

They have worked on 7 movies together! Their first movie together was The Good, the Bad, the Weird (2008) while their highest rated movie together was I Saw the Devil (2010). They have not worked together since Asura: The City of Madness (2016). They are most known for their action films together.