Wei Yuanzhong
In 692, Wu Zetian's secret police official Lai Junchen falsely accused Di, along with other chancellors Ren Zhigu, and Pei Xingben, along with other officials Cui Xuanli (崔宣禮), Lu Xian (盧獻), Wei Yuanzhong, and Li Sizhen (李嗣真), of treason. Lai tried to induce them to confess by citing an imperial edict that stated that those who confessed would be spared their lives, and Di confessed and was not tortured—but when Lai's subordinate Wang Deshou (王德壽) tried to induce him to implicate another chancellor, Yang Zhirou, refused. Di then wrote a petition on his blanket and hid it inside cotton clothes, and then had his family members take the clothes home to be changed into summer clothes. Wu Zetian thereafter became suspicious and inquired with Lai, who responded by forging, in the names of Di and the other officials, submissions thanking Wu Zetian for preparing to execute them.