Evil Unbound is a 2025 Chinese historical drama film co-written and directed by Zhao Linshan, and starring Jiang Wu, Wang Zhiwen, and Li Naiwen. The film follows the story of atrocities committed by the Imperial Japanese Army's Unit 731 during the Second Sino-Japanese War and World War II. The film premiered in Harbin on 17 September 2025 with wide-release in China on 18 September 2025, coinciding with the 94th anniversary of the September 18 Incident, which marked the start of Empire of Japan's invasion of China.