How many movies have Dong-keun Chae and Yang Dong-Wuk collaborated on?

They have worked on 3 movies together! Their first movie together was Thunderhawk From Outer Space (1986) while their highest rated movie together was Thunderhawk 5 - New Machine Thunderhawk (1988). They have not worked together since Thunderhawk 5 - New Machine Thunderhawk (1988). They are most known for their science fiction films together.