Yang Guozhong
On 15 July, Emperor Xuanzong's cortege reached Mawei Courier Station (, in modern Xianyang, Shaanxi). The imperial guards were hungry and angry at Yang Guozhong. Tibetan emissaries, who had followed the emperor, were also complaining to Yang Guozhong that they had not been fed. General Chen Xuanli believed that Yang Guozhong's actions had provoked this disaster and reported to Li Heng that he planned to accuse Yang Guozhong.