《隋书·列传·卷三十九》
十七岁时，北周大冢宰宇文护引之为亲信，继而授他为都督，累次提拔至大都督。
年十七，周大冢宰宇文护引为亲信。寻授都督，累转大都督。
At the age of seventeen, Yuweng Hu, the Grand Minister of the Northern Zhou state, took him as a confidant and then appointed him as a governor, repeatedly promoting him to Grand Governor.