Even though the term "wuxia" as the name of a genre is a recent coinage, stories about xia date back more than 2,000 years. Wuxia stories have their roots in some early youxia tales from 300–200 BCE. The Legalist philosopher Han Fei spoke disparagingly of youxias in his book "Han Feizi" in the chapter "On Five 'Maggot' Classes" about five social classes in the Spring and Autumn period. Some well-known stories include Zhuan Zhu's assassination of King Liao of Wu, and most notably, Jing Ke's attempt on the life of the King of Qin (who later became Qin Shi Huang). In Volume 86 of the "Records of the Grand Historian" ("Shi Ji"), Sima Qian mentioned five notable assassins – Cao Mo, Zhuan Zhu, Yu Rang, Nie Zheng and Jing Ke – in the Warring States period who undertook tasks of conducting political assassinations of aristocrats and nobles. These assassins were known as "cike" (刺客; literally "stabbing guests"). They usually rendered their loyalties and services to feudal lords and nobles in return for rewards such as riches and women. In Volume 124 of the "Shi Ji", Sima Qian detailed several embryonic features of xia culture from his period. These popular phenomena were also documented in other historical records such as the "Book of Han" and the "Book of the Later Han".