How many movies have Betty Chan Kwai-Wa and Lee Chiu collaborated on?

They have worked on 11 movies together! Their first movie together was Advent Commando 5: Sweet Inferno (1987) while their highest rated movie together was American Commando 6: Kill Butterfly Kill (1987). They have not worked together since Queen of Phoenix: Against Destiny (1990). They are most known for their action films together.