King Zhaoxiang of Qin
In 306 BC, the young King Zhaoxiang ascended to the throne, with his mother Queen Dowager Xuan serving as regent. Knowing Qin could not focus on eradicating Yiqu when it had the hostile eastern states to deal with, and her son's rule was still shaky due to numerous rival princes keen to capture the throne, Queen Dowager Xuan decided to use an approach of pretended conciliation. She invited the king of Yiqu to live long-term in the Ganquan Palace, and consummated a seductive liaison that produced two sons with him. This completely removed the Yiqu King's hostility towards Qin, as the beguiled king had lost all cautiousness around the Queen Dowager. At the same time, King Zhaoxiang was aggressively acting to weaken rival warring states in the east and south, and Queen Dowager Xuan was secretly planning with her son the eventual annihilation of Yiqu.
Queen Bian
Shortly after Qifu Gangui became king in 388, after the death of his brother, the founding king Qifu Guoren (King Xuanlie), he created her empress. Qifu Guoren was not mentioned as having created a empress, but could have. At that point, she was already described of as his wife. However, nothing more is known about her, including whether she was the mother of his eventual successor, his son Qifu Chipan (King Wenzhao). In 394, Qifu Gangui, in a political marriage, married the sister of the Former Qin emperor Fu Deng, the Empress Dongping, as queen, although presumably Empress Fu was deposed and Empress Bian restored after Former Qin's destruction by Later Qin later in 394, for after Qifu Gangui lost his state but restored it in 409, he again created Empress Bian empress. (The succession table below assumes as such.)