 Yuchi Chong was a general during Northern Zhou and had his defense post at Mount Heng.At that time, the general Yang Jian was the commandant at nearby Ding Province (定州, roughly near Baoding, Hebei), and Yuchi Chong, believing Yang Jian to have great ambitions, befriended Yang Jian.After Yang Jian seized power as regent in 580, Yuchi Jiong, suspicious of Yang Jian's intentions, rebelled at Xiang Province (相州, roughly modern Handan, Hebei).