《资治通鉴·隋纪·隋纪五》
炀帝命令工部尚书宇文恺在辽水西岸建造三座浮桥，浮桥建成后，引着浮桥向东岸靠近，浮桥短，距东岸还有一丈多长的距离。
帝命工部尚书宇文恺造浮桥三道于辽水西岸，既成，引桥趣东岸，桥短不及岸丈馀。
Emperor Yang ordered Yu Wenkai, the minister of the Ministry of Industry, to build three floating bridges on the west bank of Liaoshui. After the construction of the floating bridges, they were led to approach the east bank, but the floating bridges were short and there was still a distance of more than one zhang from the east bank.