How many movies have G.E.M. and George Lam Chi-Cheung acted in together?

They have worked on 1 movie together! Their first movie together was 湾区升明月——2021大湾区中秋电影音乐晚会 (2021) and was their highest rated movie together. They have not worked together since 湾区升明月——2021大湾区中秋电影音乐晚会 (2021).