《水经注·卷二十四》
又往西南流过刚县北面，据《地理志》，刚，就是以前的阐；王莽改名为柔。
又西南过刚县北，《地理志》：刚，故阐也，王莽更之曰柔。
It flows to the southwest of Gang County. According to Geographical Records, Gang was formerly called Chan; Wang Mang changed its name to Rou.