Attractive but problematic, Ex is the confident and flawed second effort from Hong Kong Cinema wunderkind Heiward Mak. The ride is a good one, but Mak's characters and the film's apparent themes are a turn off. Worth a look popstar watchers, who should like this look at an adult, if not truly sympathetic Gillian Chung. Like its eponymous subject matter, Ex is alluring and problematic – a movie that instinctively attracts before you realize (or perhaps remember later) that it's got some serious issues. Gillian Chung stars in her comeback role (after that pesky 2008 photo scandal) as Zhou Yi, a regular Hong Kong girl with regular Hong Kong problems, i.e. keeping jobs, keeping boyfriends and generally keeping herself together. When we meet Zhou Yi, she's about to embark on a long-promised trip with boyfriend Woody (Lawrence Chou), but a derailed conversation leads to a break-up - and it happens right in front of her ex-boyfriend Ping (William Chan) and his new girl Cee (Michelle Wai). With her passport in Woody's possession and some instant sympathy from Cee, Zhou Yi finds herself staying for a few days at Ping and Cee's pad.