Yuchi Chifan's grandfather Yuchi Jiong the Duke of Shu was a renowned general of Northern Zhou and a nephew of Yuwen Tai, Emperor Xuan's grandfather, making her and Emperor Xuan cousins.
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As the army withdrew from the borders after having captured the territory between the Yangtze River and the Huai River in winter 579, Yuwen Liang made the plan to ambush the commander of the entire operation, Wei Xiaokuan, and then seize the entire army and support an uncle of Emperor Xuan to be emperor.
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Wei's contribution was in capturing the important city of Shouyang, and when Emperor Xuan's cousin Yuwen Liang (宇文亮) the Duke of Qi, angry and fearful that Emperor Xuan had recently raped his daughter-in-law Yuchi Chifan, tried to ambush Wei to seize his troops to further act against Emperor Xuan, Wei defeated Yuwen Liang.