as Jicheng (Beijing), in Youzhou identifying them through their big noses and lances were used to impale their children when he rebelled against the rebel Yan emperor Shi Chaoyi and defeated rival Yan dynasty forces under the Turk Ashina Chengqing,. High nosed Sogdians were slaughtered in Youzhou in 761. Youzhou had Linzhou, another "protected" prefecture attached to it, and Sogdians lived there in great numbers. Because Gao Juren, like Tian Shengong wanted to defect to the Tang dynasty and wanted them to publicly recognize and acknowledge him as a regional warlord and offered the slaughter of the Central Asian Hu "barbarians" as a blood sacrifice for the Tang court to acknowledge his allegiance without him giving up territory, according to the book, "History of An Lushan" (安祿山史記). Another source says the slaughter of the Hu barbarians serving Ashina Chengqing was done by Gao Juren in Fanyang in order to deprive him of his support base, since the Tiele, Tongluo, Sogdians and Turks were all Hu and supported the Turk Ashina Chengqing against the Mohe, Xi, Khitan and Goguryeo origin soldiers led by Gao Juren. Gao Juren was later killed by Li Huaixian, who was loyal to Shi Chaoyi. Legacy Death toll Censuses taken in the half-century before the rebellion show a gradual increase in population, with the last census undertaken before the rebellion, in 755, recording a population of 52,919,309 in 8,914,709 taxpaying households. However, a census taken in 764, the year following the end of the rebellion, recorded only 16,900,000 in 2,900,000 households. Later censuses count only households, but by 855 this figure had risen to only 4,955,151 households, little over half the number recorded in 755. The difference in the census figures amounts to 36 million people, two-thirds of the population of the empire, though scholars have attributed this to factors including a breakdown in taxation and census gathering. The figure of 36 million was used in Steven Pinker's book The Better Angels of Our Nature, where it is presented as proportionally the largest atrocity in history with the loss of a sixth of the world's population at that time, though Pinker stated that the figure was controversial. Matthew White, from whom Pinker had taken the figure of 36 million, later revised his figure down to 13 million (based on a different calculation from the census results) in his book The Great Big Book of Horrible Things. White's