Tian Wang
The young emperor's reign did not last long, as Northern Zhou forces approached Yecheng soon thereafter. Instead of taking a last stand at Yecheng as Gao Mai suggested, Gao Wei decided to flee from Yecheng to the provinces south of the Yellow River, to try to regroup the troops, and if that could not be done, to flee to Chen Dynasty. With that in mind, Gao Wei first sent Grand Empress Dowager Hu, Retired Empress Mu, and Gao Heng to Ji Province (濟州, roughly modern Liaocheng, Shandong). He soon abandoned Yecheng and joined them there as well. Once he arrived, he issued an edict in the young emperor's name further passing the throne to Gao Wei's uncle Gao Jie () the Prince of Rencheng—although the edict appeared to have never reached Gao Jie, as the official that Gao Wei sent to deliver the edict and the imperial seal to Gao Jie, Hulü Xiaoqing (), surrendered to Northern Zhou after leaving Ji Province. (The edict also gave Gao Heng an alternative title, but what that alternative title was is disputed among historical sources. The "Book of Northern Qi" gave it as "Heavenly Prince Protector" (守國天王, "Shouguo Tian Wang"). "Zizhi Tongjian" gave it as "Heavenly Prince of Song" (宋國天王, "Songguo Tian Wang"), and Zizhi Tongjian's commentator Hu Sanxing believed that it should be "Heavenly Prince of the Primary Line" (宗國天王, "Zongguo Tian Wang"). Whether that alternative title was actually used, however, is unclear.)