《明史·志·卷六十三》
当初，永乐元年，沈阳军士唐顺说： 卫河到达直沽流入大海，南边距离黄河陆路纔五十里。
初，永乐元年，沈阳军士唐顺言： 卫河抵直沽入海，南距黄河陆路才五十里。
At that time, in the first year of the Yongle reign, Shenyang militarist Tang Shun said: The Wei River reaches the Grand Canal, and flows straight into the sea; from south of here to the Yellow River by land is a mere fifty li.