King Zhaoxiang of Qin (; 325–251 BC), or King Zhao of Qin (秦昭王), born Ying Ji (, was the king of Qin from 306 BC to 251 BC. He was the son of King Huiwen and younger brother of King Wu.
King Zhaoxiang reigned as the King of Qin for 57 years, and was responsible for the state of Qin achieving strategic dominance over the other six major states. During his reign, Qin captured the Chu capital Ying in 278 BC, conquered the Xirong state of Yiqu in 272 BC, slaughtered a 450,000-strong Zhao army at Changping in 260 BC, and overthrew the Eastern Zhou dynasty in 256 BC. These aggressive territorial expansions and the strategic weakening of other rival states paved the path for Qin's eventual unification of China three decades later by his great-grandson Ying Zheng.
Biography
Ascension
Prince Ying Ji was born in 325 BC to one of King Huiwen's more lower-ranked concubines, Lady Mi (羋八子). As a shu child, Prince Ji was given low priority in the royal line of succession, and as an underage child was not granted a fief because the state of Qin employed a system of meritocracy that demanded that even princes earn their own lands through national service. He was dispatched to the state of Yan at a young age to serve as a political hostage, a common diplomatic practice among vassal states throughout Zhou Dynasty.
In 307 BC, Ying Ji's older half-brother, King Wu, unexpectedly died after breaking his shin bones while trying to show off his physical prowess by lifting a heavy bronze cauldron in the Zhou palace at Wangcheng. King Wu died young and childless, hence placing the state of Qin into a succession crisis, with a number of princes now eligible to claim the throne. At the time, Prince Ji was still a hostage in the state of Yan, and was generally considered unlikely to be a candidate. However, King Wuling of Zhao decided to take advantage of the situation and intervene in the domestic politics of his western neighbour. King Wuling ordered his chancellor of the Dai Commandery, Zhao Gu (趙固), to smuggle Prince Ji out of Yan into Zhao territory, before endorsing him to return to Qin and contest for the throne. Furthermore, Prince Ji's maternal uncle, Wei Ran (魏冉), was a general in command of a significant Qin military forces, and helped suppressing most of his nephew's political opponents. This enabled Prince Ji to successfully claim the throne as the King Zhaoxiang of Qin at the age of 18.
Because King Zhaoxiang had not yet legally come of age (traditionally at the age of 20), his mother, who was now known as Queen Dowager Xuan, became the regent. She was supported by her brothers, Wei Ran and Mi Rong (羋戎), as well as two other sons, Prince Yi (公子悝) and Prince Fu (公子巿), the four of them collectively known as the "Four Nobles" (四貴).
Reign
In his first year as ruler (306 BC), King Zhaoxiang accepted the counsel of the Right Chancellor, Gan Mao (甘茂), who advocated the return of the Wusui (武遂) region back to the state of Han. The plan was opposed by two other officials Xiang Shou (向壽) and Gongsun Shi (公孫奭), who both despised Gan Mao greatly and proceeded to badmouth him repeatedly. This led Gan Mao to flee Qin in fear of his life and defect to the state of Qi.
In 305 BC, two of King Zhaoxiang's older half-brothers, Prince Zhuang (公子壯) and Prince Yong (公子雍), who a year ago were both rival contenders for the throne, conspired to carry out a coup with Queen Huiwen (惠文后, the mother of the late King Wu) and Queen Wu (悼武王后, King Wu's childless wife, who was a princess from Wei) as well as a dozen other lords and court officials who were against King Zhaoxiang's ascension. The rebellion was quickly crushed by Wei Ran, who slaughtered all the conspirators except Queen Wu, who was exiled back to Wei. With the annihilation of the dissidents, King Zhaoxiang's hold to the throne was secured. In the same year, King Zhaoxiang had his coming-of-age ceremony, and began to personally attend state affairs.