How many movies have Billy Luk Wing-Kuen and Charlene Choi Cheuk-Yin acted in together?

They have worked on 5 movies together! Their first movie together was The Jade and the Pearl (2010) while their highest rated movie together was 77 Heartbreaks (2017). They have not worked together since 77 Heartwarmings (2021). They are most known for their romance films together.