text: The idea that the emperor was an illegitimate child, widely believed throughout Chinese history, contributed to the generally negative view of the First Emperor. However, a number of modern scholars have doubted this account of his birth. Sinologist Derk Bodde wrote: "There is good reason for believing that the sentence describing this unusual pregnancy is an interpolation added to the Shih-chi by an unknown person in order to slander the First Emperor and indicate his political as well as natal illegitimacy". John Knoblock and Jeffrey Riegel, in their translation of Lü Buwei's Spring and Autumn Annals, call the story "patently false, meant both to libel Lü and to cast aspersions on the First Emperor". Claiming Lü Buwei—a merchant—as the First Emperor's biological father was meant to be especially disparaging, since later Confucian society regarded merchants as the lowest of all social classes.
  Reign as King of Qin
  Regency
  In 246 BC, when King Zhuangxiang died after a short reign of just three years, he was succeeded on the throne by his 13-year-old son. At the time, Zhao Zheng was still young, so Lü Buwei acted as the regent prime minister of the State of Qin, which was still waging war against the other six states. Nine years later, in 235 BC, Zhao Zheng assumed full power after Lü Buwei was banished for his involvement in a scandal with Queen Dowager Zhao.
  Zhao Chengjiao, the Lord Chang'an (), was Zhao Zheng's legitimate half-brother, by the same father but from a different mother. After Zhao Zheng inherited the throne, Chengjiao rebelled at Tunliu and surrendered to the state of Zhao. Chengjiao's remaining retainers and families were executed by Zhao Zheng.