Uniform is the 2003 feature film debut of director Diao Yi'nan, who had previously worked as an established screenwriter for directors such as Zhang Yang and Shi Runjiu. The film, produced by Hu Tong Communications, was distributed via DVD in the United States by First Run Features as part of the Global Film Initiative.

Uniform follows a young man, Wang Xiaojian, who, down on his luck, comes upon a seemingly abandoned policeman's uniform. Putting it on, Wang discovers he can have influence and control not only on others but himself as well.

The film premiered at the 2003 Vancouver International Film Festival where it won the Dragons and Tigers award. It also screened at a handful of other international film festivals, notably Rotterdam, where it was the only Chinese film in competition for the Tiger Award.