Reign of Assassins is a 2010 wuxia film directed by Su Chao-pin and co-directed by John Woo. The film is shot in China and set during the Ming Dynasty. The film stars Michelle Yeoh, who plays an assassin who tries to return to a normal life after being counseled by a monk. After saving her husband and herself from robbers, she attracts the attention of her former assassin gang.

John Woo Yu-Sen is a Hong Kong filmmaker, known as a highly influential figure in the action film genre. He is a pioneer of heroic bloodshed films and the gun fu genre in Hong Kong action cinema, before working in Hollywood films. He is known for his highly chaotic "bullet ballet" action sequences, stylized imagery, Mexican standoffs, frequent use of slow motion and allusions to wuxia, film noir and Western cinema.