and Dao and Han's plots, was stripped of his governmental posts and ordered to keep Emperor Fei company. The deaths of Liu and Han, both of whom were close associates of Emperor Wen, brought fear into the heart of another associate of Emperor Wen—Hua Jiao (華皎) the governor of Xiang Province (湘州, modern central Hunan). In summer 567, Hua therefore submitted himself to Northern Zhou and Northern Zhou's vassal state, Western Liang. Chen Xu sent Wu and Chunyu Liang (淳于量) to lead a fleet against the joint forces of Hua, Northern Zhou, and Western Liang. The opposing sides met at Dunkou (沌口, in modern Wuhan, Hubei). Wu and Chunyu were able to ram Hua's, Northern Zhou's, and Western Liang's fleets, causing them to collapse. Both Hua and the Northern Zhou general Yuwen Zhi (宇文直) the Duke of Wei fled to Western Liang's capital Jiangling, while the Northern Zhou general Yuan Ding (元定) were captured. Wu followed up by putting Jiangling under siege in spring 568, but was not able to capture it and subsequently forced to withdraw. Meanwhile, Chen Xu was receiving greater formal titles and authorities. Chen Bomao, angry over the situation, was making repeated denigrations of Chen Xu, who then resolved to take the throne himself. In winter 568, Chen Xu had an edict issued in the name of Emperor Wu's wife Grand Empress Dowager Zhang Yao'er, falsely accusing Emperor Fei of having been part of the plots of Liu and Hua. The edict further stated that Emperor Wen had already known that Emperor Fei was unsuitable, and that Emperor Wen's stated desire to have Chen Xu take the throne should be carried out. Emperor Fei was deposed and demoted to the title of Prince of Linhai, while Chen Bomao was demoted to Marquess of Wenma and subsequently assassinated. Early reign For reasons unclear in history, Chen Xu left the throne empty for more than a month, but finally took the throne in spring 569 (as Emperor Xuan). He honored Grand Empress Dowager Zhang as empress dowager instead, while Emperor Wen's wife Empress Dowager Shen became known as Empress Wen. He created his wife Princess Liu empress and his heir apparent Chen Shubao crown emperor. Emperor Wen's sons continued to have honored positions as imperial princes and held key posts, but none had particularly high power. In fall 569, Emperor Xuan, suspicious that Ouyang He (歐陽紇) the governor