throne to Gao Wei and assumed the title Taishang Huang (retired emperor), he continued to be in charge of important decisions. As both he and Zu were still resentful of Emperor Wenxuan (because Emperor Wenxuan often battered Emperor Wucheng, and because Emperor Wenxuan often referred to Zu as "the thief"), Zu, in order to flatter Emperor Wucheng, suggested that Emperor Wenxuan's posthumous name and temple name be degraded—because Emperor Wenxuan was not wen (文, civil) nor was he a founder (which his temple name Xianzu (顯祖) would appear to denote. (Emperor Wenxuan was in fact Northern Qi's first emperor, but Emperor Wucheng did not view him as a founder as he viewed their father Gao Huan as the true founder of the dynasty.) Around the new year 566, by Zu's suggestion, Emperor Wenxuan's posthumous name was changed to Jinglie (景烈), and his temple name to Weizong, both of which were still complimentary but less so than before. Also in 566, Zu and He Shikai falsely accused Emperor Wucheng's nephew Gao Xiaowan (高孝琬), the Prince of Hejian, of using witchcraft against Emperor Wucheng and satirizing the retired emperor. Eventually, Emperor Wucheng arrested and tortured Gao Xiaowan, leading to his death. In 567, the ambitious Zu, wanting further promotion, wrote petitions accusing He Shikai, Zhao Yanshen (趙彥深), and Gao Wenyao (高文遙) of crimes and requested his friend Liu Ti (劉逖), a secretary to the emperor, to submit the petitions for him. Liu refused, but He Shikai, Zhao, and Gao Wenyao received the news and prepared to defend themselves. Emperor Wucheng arrested Zu and interrogated him—and when seeing Emperor Wucheng, Zu accused He Shikai, Zhao, and Gao Wenyao of corruption, factionalism, and favoritism. Emperor Wucheng took the accusations personally and felt that Zu was assaulting his own competence. When Zu brought up the fact that he had an excessive number of ladies-in-waiting, he became even more infuriated. His anger grew even more heated when Zu first compared him to Xiang Yu and then pointed out that his accomplishments were far less. Emperor Wucheng battered and whipped him and sentenced him to hard labor, and subsequently had him confined to a dungeon in Guang Province (光州, roughly modern Yantai, Shandong). As Chinese cabbage seed oil was used as a lighting source in the dungeon, over time, the smoke from the burning of the oil made Zu blind. After Emperor Wucheng's death In 568, Emperor