石世
Nothing further was recorded of her activities until Shi Hu's death in 349. Initially, Shi Hu's youngest son Shi Shi was proclaimed emperor pursuant to Shi Hu's wishes, but Shi Zun soon overthrew him and his mother Empress Dowager Liu in a coup and claimed imperial title. The former Empress Zheng became empress dowager, and Shi Zun consulted her on major decisions. In late 349, Shi Zun, at a meeting with a number of his brothers and Empress Dowager Zheng attending, announced a plan to execute Shi Min the Duke of Wuxing—Shi Hu's adopted grandson and a fierce general, but one whose ambitions had made Shi Zun apprehensive of him. The princes all announced agreement, but Empress Dowager Zheng opposed, reasoning that Shi Min had contributed much to Shi Zun's coup against Shi Shi and it would be ungrateful to execute him. Shi Zun hesitated, while one of his brothers, Shi Jian the Prince of Yiyang, reported the plot to Shi Min, who quickly surrounded Shi Zun's palace and executed him. Empress Dowager Zheng was also killed.