Blood 13 is a Chinese police procedural film that follows the story of two police officers as they track a serial killer.^[1]

The film follows policewoman Xing Min (played by Lu Huang) who partners with veteran policeman Old Zhou (played by Gang Xie) in the investigation of a murderer that is in the midst of targeting prostitutes in a killing spree, after they determine that the deaths are tied to the same serial killer that Old Zhuo has been tracking for fifteen years.^[2] Their plot to catch the killer sees Xing Min posing as bait for their next victim, while struggling with her own prejudice against women engaged in prostitution.^[2]

Blood 13 was directed by Li Lingcong (Candy Li) with an international crew,^[3] and the director of photography for the film was Haga Hiroyuki.^[4] The screenplay was written by Tu Hu.^[2] The film premiered at the 8th Beijing International Film Festival^[5][6] on April 18, 2018,^[7] and was wide-released in China on June 15, 2018.^[8] It was released digitally in North American in August 2019.^[5]