How many movies have Alex Yip Choi-Nam and Bill Lui Tak-Wai collaborated on?

They have worked on 3 movies together! Their first movie together was Teenage Mutant Ninja Turtles (1990) while their highest rated movie together was Skinny Tiger, Fatty Dragon (1990). They have not worked together since Tiger Cage II (1990). They are most known for their action films together.