In spring 821, by which time Emperor Xianzong had died and been succeeded by his son
Emperor Muzong,
Liu Zong the military governor of Lulong Circuit offered to resign and submit his circuit to imperial rule. As Liu was concerned that his officers might not abide by the decision he made, he further proposed that Lulong be divided into three circuits, with the circuit capital, You Prefecture (), along with Zhuo Prefecture (涿州, in modern
Baoding,
Hebei), be given to Zhang Hongjing; Ji (薊州, in modern
Tianjin), Gui (媯州, in modern
Zhangjiakou,
Hebei), and Tan (檀州, in modern Beijing) Prefectures be given to the general
Xue Ping; and Ying () and Mo (莫州, both in modern
Cangzhou,
Hebei) Prefectures be given to the official Lu Shimei (). (Liu had made these recommendations on the bases that when Zhang ruled Hedong, which neighbored Lulong, Liu had often heard good opinions of Zhang's governance; that Xue was the son of
Xue Song and familiar with the region; and that Lu was a relative of Liu's wife's.) Further, believing that a number of senior army officers, including
Zhu Kerong, were difficult to control, he sent them to Chang'an and requested that Emperor Muzong give them promotions. In fall 821, when a low-level officer accidentally collided with Wei's guards, Wei ordered the officer whipped, but the other officers were unaccustomed to this kind of punishment and refused to carry out the punishment. Zhang Hongjing had the officers arrested. That night, the soldiers mutinied, killed Wei and several other staff member of Zhang's, and put Zhang under arrest. The next day, the mutineers began to regret their actions, but when they met Zhang to ask for forgiveness, Zhang did not speak at all. The mutineers believed that Zhang was not intending to pardon them, and instead supported Zhu Kerong's father Zhu Hui () to serve as the acting military governor. Zhu Hui declined, but recommended Zhu Kerong, and the soldiers agreed. Upon hearing of the mutiny, Emperor Muzong, intending to calm the mutineers, announced that Zhang would be demoted to be the prefect of Ji Prefecture (吉州, in modern
Ji'an, Jiangxi). Zhu Kerong, however, allied with
Wang Tingcou, who had around the same time mutinied at and taken over Chengde Circuit, killing the imperial general
Tian Hongzheng, and the two circuits waged a campaign against the imperial troops sent to combat the mutinies. Emperor Muzong eventually allowed Zhu Kerong to become the military governor of Lulong in winter 821, and only after receiving his commission did Zhu release Zhang and Lu (whom he also captured). After Zhang was released, he was made the prefect of Fu Prefecture (撫州, in modern
Fuzhou, Jiangxi). He was soon made an advisor to the
Crown Prince Li Zhan. He died in 824, shortly after Emperor Muzong's death and Li Zhan's succession to the throne as Emperor Jingzong. == Notes and references ==