In 450, at the suggestion of his staff members Min Dan (閔湛) and Chi Biao (郗標), Cui carved the text of the histories that he was the lead editor of onto stone tablets, and erected the tablets next to the altars to Heaven outside of Pingcheng. The tablets were said to have revealed much about Emperor Taiwu's ancestors, and the Xianbei were very angry, accusing Cui of revealing the ancestors' faults and damaging the image of the state. Emperor Taiwu, in anger, arrested Cui.