楚王
Later in 690, Empress Dowager Wu had Emperor Ruizong yield the throne to her, establishing Zhou Dynasty as its "emperor" and interrupting Tang Dynasty. She created a number of her Wu clan relatives princes, and, after posthumously created Wu Youji's grandfather Wu Shirang the Prince of Chu, she created Wu Youji the Prince of Qiancheng. In 691, she created him the greater title of Prince of Ding. At a later point, however, his title was reduced to Prince of Anding.