《金史·本纪·卷十五》
枢臣说 ：此役兴建，实为大计，现在工程已过半，偶遇大雨，离完成就更远了。
枢臣言： 是役之兴，实为大计，今功已过半，偶值霖潦，成功差迟。
The Privy Minister said: "This project is a great plan, and now the project is half finished. If there is a heavy rain, it will be even further away from completion.