The Promise is a 2005 Chinese epic fantasy film directed by Chen Kaige, starring Jang Dong-gun, Hiroyuki Sanada, Cecilia Cheung, and Nicholas Tse.

It is loosely adapted from The Kunlun Slave, a wuxia romance story written by Pei Xing in the ninth century during the Tang dynasty.

She encounters the goddess Manshen and accepts an offer to enjoy a wealthy and luxurious life and become the most beautiful woman in the land.

General Guangming defeats a large army of barbarians with only 1,000 soldiers and rushes back to save the King, who is besieged in the palace by the traitorous Duke Wuhuan.

A while later, Guangming is caught off guard and injured by Snow Wolf, Wuhuan's henchman, but is saved by his slave, Kunlun.

While Guangming and Qingcheng lead a happy life in the countryside, Kunlun uses his speed power to see the Veil of Time and learns that Wuhuan is responsible for the destruction of his family and homeland.

In North America, The Promise was originally scheduled to be released in December 2005 by The Weinstein Company (TWC) under the title Master of the Crimson Armor.

However, TWC eventually cancelled the release and sold the film's distribution rights to Warner Independent Pictures (WIP).

WIP retained the changes made by TWC, but reverted the film's title back to The Promise and released it on 5 May 2006 in 213 theatres.

The film's production crew were accused of damaging the vegetation and natural scenery of the area and the surrounding Bigu Lake, and for leaving behind a large amount of undisposed household waste.

After it was released on the internet, Chen Kaige threatened legal action for copyright infringement, but the case fizzled out due to widespread support for Hu from Chinese citizens.