deposed Emperor Fei and made Gao Yan emperor (as Emperor Xiaozhao). Hulü Guang was created the Duke of Julu, and later that year, when Emperor Xiaozhao created his son Gao Bainian crown prince, Emperor Xiaozhao, on account of Hulü Guang's achievements and loyalty, took Hulü Guang's first daughter as Gao Bainian's wife and crown princess. When Emperor Xiaozhao was near death in 561, however, believing that Gao Bainian was too young, he instead passed the throne to his brother Gao Zhan the Prince of Changguang, who took the throne as Emperor Wucheng. Hulü continued to serve under Emperor Wucheng. During Emperor Wucheng's reign In 564, Emperor Wucheng killed Gao Bainian, and subsequently, Hulü's daughter and Gao Bainian's wife Princess Hulü, in distress, refused to eat, and she died a month thereafter. It was said that she died while holding tight to a jade tablet that Gao Bainian gave her, and that no one could pry it loose even after her death, until Hulü Guang was finally able to pry it from her hand. In spring 564, Northern Zhou, in alliance with Tujue, launched a major attack on Northern Qi, attacking the secondary capital Jinyang (晉陽, in modern Taiyuan, Shanxi) from the north and Pingyang (平陽, in modern Linfen, Shanxi) from the south. Hulü was sent to resist the southern prong, commanded by the Northern Zhou general Daxi Wu (達奚武), and was successful in his resistance. Subsequently, when Duan Shao (段韶) defeated the northern prong, Hulü informed Daxi of this and induced Daxi to retreat. When Hulü subsequently rendezvoused with Emperor Wucheng at Jinyang, Emperor Wucheng, in sadness and relief, hugged Hulü's head and cried. In winter 564, Daxi again attacked, this time against the important city of Luoyang. Emperor Wucheng sent Duan, Hulü, and his nephew Gao Changgong, the Prince of Lanling to relieve Luoyang, and they defeated Northern Zhou troops, killing Daxi's lieutenant Wang Xiong (王雄), forcing Daxi to retreat. For this victory, Emperor Wucheng created Hulü with an additional title of Duke of Guanjun. Sometime during Emperor Wucheng's reign, Emperor Wucheng had taken Hulü's second daughter as the wife and crown princess of his son, the Crown Prince Gao Wei. In 565, at the urging of the officials He Shikai and Zu Ting, Emperor Wucheng passed the throne to Gao Wei and created Crown Princess Hulü empress. (Emperor Wucheng took the title of Taishang Huang (retired emperor) and