King Zhaoxiang of Qin
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).
Empress Qian
Empress Qian had no children, and when the Zhengtong Emperor died in 1464, he was succeeded by the Chenghua Emperor. She became involved in a conflict with Empress Xiaosu, the biological mother of the new emperor. As the mother of the emperor, Empress Xiaosu demanded the same title as Qian: that of empress dowager. The mother of the emperor pointed out that she was the mother of the emperor while Qian was childless, while Qian demanded the title pointing to her loyalty to the late emperor, whose house arrest she had shared.
The emperor was unable to solve the conflict to the satisfaction of both parties, but granted the title of empress dowager to both, though Qian's formal title acknowledged her higher rank and precedence in court proceedings.