Wong Kar-wai, 1994. Two parallel love stories in Hong Kong. Quentin Tarantino's pet film.
From Wikipedia
Chungking Express is a 1994 Hong Kong film, written and directed by Wong Kar-wai. The film consists of two stories told in sequence, each about a different lovesick Hong Kong policeman mulling over his relationship with a woman. The first story stars Takeshi Kaneshiro as a cop obsessed by his breakup with a woman named May and his encounter with a mysterious drug smuggler. The second stars Tony Leung as a police officer roused from his gloom over the loss of his flight attendant girlfriend by the attentions of a quirky snack bar worker.