 Later in 684, pursuant to suggestions by her nephew Wu Chengsi, Empress Dowager Wu planned to posthumously honor her ancestors princes, and also build seven ancestral temples for them—a highly sensitive move, in that regulations allowed only the emperor to build seven ancestral temples, while any noble family, no matter how honored, was restricted to no more than five temples.Pei argued against the move, specifically comparing Empress Dowager Wu's actions to those of Emperor Gao of Han's wife Empress Lü Zhi (whose clan was powerful in her lifetime as empress dowager but was slaughtered after her death), to no avail, and she began to view him negatively from that point on.Their conflict became worsened later that year, as Empress Dowager Wu, listening to Wu Chengsi's advice, began considering seizing the throne herself with the title of "emperor."