Hulü Guang
In winter 570, when the Northern Qi general Hulü Guang seized the region north of the Fen River (汾水, flowing through modern Linfen, Shanxi), Yuwen Hu turned to another brother of Emperor Wu, Yuwen Xian the Duke of Qi, for advice, and Yuwen Xian suggested that he himself could lead an army against Hulü, while Yuwen Hu himself should command the main forces but stop at Tong Province (同州, roughly modern Weinan, Shaanxi). Subsequently, Yuwen Xian was able to force Hulü into a stalemate, but substantial territories were still lost to Northern Qi.