《水经注·卷二十一》
吕后元年前，把孝惠帝后宫所生的儿子义封在这里，立为侯国，王莽改名为相成。
吕后元年，立孝惠后宫子义为侯国，王莽更名相成也。
Before the Yuannian Reign of Empress Lü, the son of Empress Dowager Empress Hui who was born in the harem was enfeoffed here, and it was established as a county. Wang Mang changed its name to Xiangcheng.