How many movies have Ben Ng Ngai-Cheung and Frankie Ng Chi-Hung acted in together?

They have worked on 8 movies together! Their first movie together was To Be No. 1 (1996) while their highest rated movie together was A True Mob Story (1998). They have not worked together since Gu Shen 2 (2016). They are most known for their crime films together.