In fall 443, while attacking Rouran, Emperor Taiwu suddenly encountered Yujiulü Wuti, and Crown Prince Huang, who was with him, advised an immediate attack, but Emperor Taiwu hesitated, allowing Yujiulü Wuti to escape. From that point on, Emperor Taiwu began to listen to Crown Prince Huang's advice in earnest, and in winter 443, he authorized Crown Prince Huang to carry out all imperial duties except the most important ones, under assistance from Qiumuling Shou (丘穆陵壽), Cui, Zhang Li (張黎), and Tuxi Bi. Crown Prince Huang soon instituted a policy to encourage farming—by mandatorily requiring those who had extra cattle to loan them to those without, to be animals of burden, with the lease being paid for by those without cattle by tilling the grounds of the cattle owners, increasing the efficiency of the farmlands greatly.