How many movies have Andrew Lau Wai-Keung and Raven Choi Yip-San collaborated on?

They have worked on 7 movies together! Their first movie together was The Saint of Gamblers (1995) while their highest rated movie together was Young and Dangerous 3 (1996). They have not worked together since Young and Dangerous: The Prequel (1998). They are most known for their action films together.