Zhao Zhihong (simplified Chinese: 赵志红; traditional Chinese: 趙志紅; pinyin: Zhào Zhìhóng; 5 September 1972 - 30 July 2019), nicknamed The Smiling Killer and Demon, was a Chinese serial killer and rapist. He admitted to committing a total of 20 serious crimes between 1996 and 2005, including raping and killing at least 6 women in Ulanqab and Hohhot in Inner Mongolia. He was executed in 2019, following a court verdict.