How many movies have Frankie Ng Chi-Hung and Oscar Lam Wai-Kin acted in together?

They have worked on 4 movies together! Their first movie together was Operation Billionaires (1998) while their highest rated movie together was The Forbidden Legend: Sex & Chopsticks 2 (2009). They have not worked together since 江湖之社团风暴 (2017). They are most known for their drama films together.