Qin dynasty
Note: King Zhaoxiang of Qin (秦昭襄王) had already been ruling Qin for 51 years when Qin annihilated the Zhou dynasty; however the other six warring states were still independent regimes. Some Chinese historiographers thus used the next year (the 52nd year of King Zhaoxiang of Qin) as the official succession from the Zhou dynasty.
Queen Dowager Xuan
Queen Dowager Xuan (; 338–265 BC), also called Mi Bazi (), was a girl from the royal family of the Kingdom of Chu and one of the imperial concubines (consorts but not the wife) of King Huiwen of Qin. She gave birth to King Zhaoxiang of Qin (r. 306–251 BC) and acted as his regent when he was young. As queen dowager, she entered illicit relations with the "barbarian" Yiqu king and had two sons with him, but later tricked and killed him. Following that coup, the Qin army marched into Yiqu territory at the queen dowager's orders; the Qin annihilated Yiqu and thus came to possess the Ordos region.