《北史·列传·卷六》
于是，加封他为抚军大将军、太子少保，又兼尚书左仆射。
加抚军大将军、太子少保，又兼尚书左仆射。
He thus enfeoffed Yuan Cheng as General of the Pacifying Army, Prince Guardian to the Crown Prince, and Assistant Minister of the Bureau of the Left.