A still photo of the film "Once upon a Time in Tibet" [Photo: yule.sohu.com]

A trailer for the Chinese film "Once upon a Time in Tibet" ("Xizang Wang Shi") has been released.

Set in the 1940s during World War Two, the film revolves around a struggling romance between a troubled American Air Force pilot and a Chinese woman.

Robert (Joshua Hannum), who is on a mission to bring supplies to China, is seriously injured after being accidentally ejected from his aircraft. He is saved by Yongcuo (Song Jia) with whom he soon falls in love. But the romance is challenged as a local man named Jiangcuo (Peter Ho) is determined to capture Robert for the sake of his own freedom.

The film is the second feature of Chinese director Dai Wei who made her directorial debut with the 2006 musical film "Ganglamedo" ("Gang La Mei Duo").

"Once upon a Time in Tibet" will open on March 25.