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

Stellar casts have in recent years been used to add appeal to revolutionary films.

The Founding of a Republic (2009), for instance, boasts around 100 celebrities, including Jackie Chan, Jet Li and Andy Lau. Beginning of the Great Revival (2010) features 108 pop stars, including Chow Yun-fat.

Lau Kar-ling, who plays Chiang's wife, Soong May-ling, says she pored over historical documents to prepare for her role.

Zuo Heng, China Film Archives' associate research fellow, calls Cairo Declaration a "breakthrough" because of its narration's broad view.

"Such artistic productions will urge more people to hunt for the truth of history."