A scene from Cairo Declaration. [Photo provided to China Daily]

The Cairo Declaration－issued by China, the United States and the United Kingdom after the conference－elevated China's status as a major power. (Joseph Stalin didn't attend the conference but later declared his support.)

Critics doubt (the storyline) is suitable for cinema, Liu says.

"They wouldn't question if they saw the film."

Liu is former deputy director of August First Film Studio, affiliated with the People's Liberation Army. He wrote the revolutionary TV series The East, which chronicles New China's early years and topped ratings in 37 cities in 2011.

Cairo Declaration was co-produced by August First Film Studio and Chongqing Film Group.

It was made over three years with a cast of 154 actors and actresses from China and such countries as the US, the UK, Germany and Japan. It features such Chinese stars as mainland A-lister Hu Jun and Hong Kong star Carina Lau Kar-ling.