宇文護
In 567, in light of the death of Chen's Emperor Wen and succession by his son Emperor Fei of Chen in 566, the high level Chen officials engaged in infighting, and Emperor Wen's brother Chen Xu was victorious. The general Hua Jiao (), the governor of Xiang Province (roughly modern Changsha, Hunan), felt uneasy, and therefore sought aid from Northern Zhou and Western Liang. Yuwen Hu, over the opposition by the official Cui You (), sent an army commanded by Emperor Wu's brother Yuwen Zhi () the Duke of Wei to assist Hua and Western Liang, which was also aiding Hua. The Chen general Wu Mingche, however, quickly defeated the joint forces of Northern Zhou, Western Liang, and Hua, forcing Hua and Yuwen Zhi to both give up the war and flee to the Western Liang capital Jiangling. Chen was able to retain all of Hua's territory and further make minor territorial gains against both Northern Zhou and Western Liang as well. Yuwen Hu relieved Yuwen Zhi from his posts, and while Yuwen Zhi was eventually restored to them, Yuwen Zhi, who had previously had a cordial relationship with Yuwen Hu, bore a grudge against Yuwen Hu and secretly encouraged Emperor Wu to act against Yuwen Hu.