《资治通鉴·后梁纪·后梁纪一》
调发山东百姓输送军粮，周德威天天派出轻骑兵抄劫，李思安于是从东南山口修筑甬道，与夹寨连接。
调山东民馈军粮，德威日以轻骑抄之，思安乃自东南山口筑甬道，属于夹寨。
He mobilized the people of Shandong to transport food supplies for the army. Zhou Dewei sent out light cavalrymen to plunder every day, so Li Si'an built a tunnel from the southeast gate to connect with Jianzhai.