《水经注·卷三》
秦始皇命令太子扶苏和蒙恬一起筑长城，从愉锣胜开始直到竭石，就是这道城。
始皇令太子扶苏与蒙恬筑长城，起自临洮，至于碣石，即是城也。
Qin Shihuang ordered Crown Prince Fusu and Meng Tian to build the Great Wall, starting from Yuluosheng to Jieshi, which is this city.