Spring Fever (Chinese: 春风沉醉的晚上; literally "A Night Deeply Drunk on the Spring Breeze") is a 2009 Chinese film directed by Lou Ye. The production of the film is in defiance of a five-year ban on filmmaking imposed by China's State Administration of Radio, Film, and Television (SARFT) for his previous film, Summer Palace.[1] The film was reportedly surreptitiously shot in the city of Nanjing.[1] It is described to be about a young threesome overcome with erotic longings.[2]
By the time of the film's premiere at the Cannes Festival on May 13, 2009, it was known that Lou had circumvented the five-year ban imposed upon him after Summer Palace by having Spring Fever registered as a Hong Kong/French co-production, and by secretly filming in Nanjing

Synopsis: Nanjing, 2009. Luo Haitao has been hired by Wang Ping’s wife to spy on the passionate relationship between her husband and another man, but slowly loses control of the situation. With his beautiful girlfriend, Li Jing, he is drawn in to the affair, overcome by the fever of drunken spring nights. All are possessed by an exhilarating madness of the senses, a dangerous malady that leads the heart and head astray…