How many movies have Mona Fong Yat-Wah and Sek Gong collaborated on?

They have worked on 15 movies together! Their first movie together was The Proud Twins (1979) while their highest rated movie together was Rendezvous with Death (1980). They have not worked together since The 8 Diagram Pole Fighter (1984). They are most known for their action films together.