How many movies have Oscar Lam Wai-Kin and Sophie Ngan Chin-Man acted in together?

They have worked on 5 movies together! Their first movie together was Dance with the Killer (2000) while their highest rated movie together was The Peeper's Story 2 - The Escape Partner (2003). They have not worked together since Jiang Hu: She Tuan Feng Bao (2017).