《宋史·列传·卷十五》
四年，改任山南东道节度，从梁国公改封为许国公。
四年，移山南东道节度，自梁国公改封许国公。
Four years later, he was transferred to the post of Jiedushi of Shannan East Circuit, and his title was changed from Duke of Liang to Duke of Xu.