Tian Hongzheng
The Chengde soldiers, however, had long resented Tian Hongzheng, as during Emperor Xianzong's reign Chengde and Weibo forces had often battled each other. Initially, with Weibo soldiers accompanying Tian Hongzheng to Chengde and protecting him, they did not act, but as soon as Weibo soldiers returned to Weibo in summer 821, the Chengde officer Wang Tingcou rose in mutiny and killed Tian Hongzheng. Upon hearing of Tian Hongzheng's death, Li Su changed into mourning clothes, and he stated to his soldiers: