《明史·志·卷五十九》
黄河从谷亭转入运河，顺流向南，二日到达徐州，徐州逆流向北，四日纔到达谷亭，黄河水利没有比这更大的。
黄河自谷亭转入运河，顺流而南，二日抵徐州，徐州逆流而北，四日乃抵谷亭，黄水之利莫大於此。
The Yellow River turns into the canal from Guting, and then runs southward with the flow within two days and reaches Xuzhou, while it takes four days to go against the flow from Xuzhou and reach Guting. There is no greater convenience than this in the benefits of the Yellow River.