King Zhaoxiang of Qin
Reigning over 55 years, he was one of the longest-serving rulers during the Eastern Zhou Dynasty. Although making numerous policy mistakes during his later years, his aggressive territorial expansions were pivotal in consolidating the state of Qin as the dominant military powerhouse in the late Warring States period. It was the strategic dominance established during his reign that paved the way to Qin's eventual successful unification of China under his great-grandson, Ying Zheng.
Duke Ai of Qin
Duke Ai of Qin (, died 501 BC) was from 536 to 501 BC the nineteenth ruler of the Zhou Dynasty state of Qin that eventually united China to become the Qin Dynasty. His ancestral name was Ying (嬴), and Duke Ai was his posthumous title. Duke Ai succeeded his father Duke Jing of Qin, who died in 537 BC, as ruler of Qin.