《资治通鉴·梁纪·梁纪三》
听说贼敌屡次提出要以宿豫交换朐山，如果真是这样的话，用这块无用之地，换回来那块过去就属我们所有的疆域，兵戈之争顿时化解，其益处是非常大的。 
闻贼屡以宿豫求易朐山，若必如此，持此无用之地，复彼旧有之疆，民役时解，其利为大。 
I have heard that the enemy has repeatedly proposed trading Suyu for Qushan. If this is true, using this useless place to exchange for territory that once belonged to us will instantly resolve the armed conflict, and the benefits are great.