that Emperor Wuzong, who had an outgoing personality, particularly disrespected Li Yi. In early 846, Emperor Wuzong became extremely ill and was himself rendered mute. The palace eunuchs gathered and decided on Li Yi as Emperor Wuzong's successor, probably because they considered him simple-minded and therefore easier to control. They had an edict issued in Emperor Wuzong's name creating Li Yi crown prince, changing his name to the more auspicious Li Chen, and investing him with authority over imperial affairs. It was said that when Li Chen met the officials in his new role as crown prince, they were astonished that the apparent simpleton exhibited punctilious adherence to the complex ritual expressions of grief for Wuzong, and immediate knowledgeable management of the court's pending business. Apparently, Li Chen's simple-mindedness had been an affectation, to make himself appear harmless during the dangerous intrigues of his predecessors' reigns. Soon thereafter, Emperor Wuzong died, and Li Chen took the throne (as Emperor Xuanzong). Early reign Emperor Xuanzong honored his mother Consort Zheng as empress dowager. Immediately after taking the throne, Emperor Xuanzong acted against the powerful chancellor Li Deyu, who had dominated the court during Emperor Wuzong's reign, as he despised Li Deyu for monopolizing power. Emperor Xuanzong removed Li Deyu from his chancellor position and sent him out of the capital Chang'an to serve as the military governor of Jingnan Circuit (荊南, headquartered in modern Jingzhou, Hubei), and also removed Li Deyu's fellow chancellor Zheng Su. Over the next few years, Emperor Xuanzong purged those officials he considered sympathetic to Li Deyu, and further pursued charges against Li Deyu based on Li Deyu having executed the minor official Wu Xiang () on charges that should not have warranted death (Li Deyu was resentful of Wu Xiang's uncle Wu Wuling (). Li Deyu was repeatedly demoted and sent farther and farther away from Chang'an, eventually dying in exile around the new year 850 in Yai Prefecture (崖州, in modern Haikou, Hainan). These actions were considered to have largely ended the factionalism among imperial officials known as the Niu–Li factional strife, which had plagued the imperial government ever since the reign of Emperor Muzong. A number of policies that Emperor Wuzong and Li Deyu had pursued, including persecution against Buddhism and alliance with the Yenisei Kirghiz, were reversed. In Li Deyu's place, Emperor Xuanzong installed Bai Minzhong as the leading chancellor, and over the