Wang Xiaoshuai poses with the Silver Bear trophy during the 58th Berlin Film Festival.  [Xinhua]

A Chinese film about love, responsibility and infidelity won the Silver Bear award for best script at the 58th Berlin Film Festival on Saturday. Based on a true story, In Love We Trust (Zuo You), Wang's eighth film, tells the tale of a divorced couple who agree to bear another child in order to save their dying daughter.

"It may sound like a soap opera but I hope this film goes beyond boundaries," Wang said in an earlier interview with China Daily. "It deals with ordinary, middle class people in a way that could take place in any country."

For Wang, the film marks a change in generational focus from previous films like Beijing Bicycle, which had teenage boys and girls as its protagonists and won the Grand Jury Silver Bear Award at the 2001 Berlin Film Festival.