LHASA, Jan. 31-- China's first film with dialogue purely in Tibetan opened in cinemas across Tibet Saturday.

The two-hour "Tibet Sky"(or "Phurbu & Tenzin"), was filmed on the Tibetan plateau with an all-Tibetan cast. It narrates the life of Tenzin, child of a serf-owner, and Phurbu, serf of Tenzin, from the liberation of Tibet in the 1950s until the 1980s.

Screenwriter Alai, a Chinese novelist of Tibetan descent, said the script was modified 17 times in order to more authentically reflect Tibetan culture.

Tibetan actor Lawang Norbu said the film respects the history and reality of Tibet, which will help the audience understand a real Tibet. He said he hoped that the film will be introduced to audiences around the world.

Earlier in 2014 the film was released with Chinese subtitles in places such as Shanghai, Sichuan and Guangdong.

Ren Zhonglun, producer of the film, said, "We will further improve the content of the film based on the feedback of the Tibetan audience in order to better present the history of Tibet."

"We plan to translate the film into different languages such as German, French, Italian and Japanese and have it released around the world," Ren said.