Yang Xinhai (Chinese: 杨新海) (July 29, 1968 – February 14, 2004), also known as Wang Ganggang, Yang Zhiya, and Yang Liu, was a Chinese serial killer who confessed to committing 65 murders and 23 rapes between 1999 and 2003, and was sentenced to death and executed for 67. He was dubbed the "Monster Killer" by the media. He is the most prolific serial killer China has seen.
Yang was born on July 29, 1968 in Zhengyang County, Zhumadian, Henan Province, China. His family was one of the poorest in their village. The youngest of four children, Yang was clever but introverted. He dropped out of school in 1985, at age 17, and refused to return home, instead traveling around China and working as a hired laborer.
In 1988 and 1991, Yang was sentenced to labor camps for theft in Xi'an, Shaanxi and Shijiazhuang, Hebei. In 1996, he was sentenced to five years in prison for attempted rape in Zhumadian, Henan and released in 1999.
Yang's killings took place between 1999 and 2003 in the provinces of Anhui, Hebei, Henan and Shandong. At night, he would enter his victims' homes, and kill all of the occupants—mainly farmers—with axes, hammers and shovels, sometimes killing entire families. Each time he