How many movies have Douglas Kung Cheung-Tak and Ken Yip Wing-Kin collaborated on?

They have worked on 7 movies together! Their first movie together was Angel Enforcers (1989) while their highest rated movie together was God of Gamblers (1989). They have not worked together since Shaolin vs. Evil Dead 2: Ultimate Power (2006). They are most known for their action films together.