《水经注·卷二十五》
汉武帝元朔二年前，封城阳共王的儿子吉为东莞侯。
汉武帝元朔二年，封城阳共王子吉为东莞侯。
Before the 3rd year of Emperor Wu of the Han Dynasty, Emperor Wu of the Han Dynasty granted the title of Marquis of Dongguan to Ji, the son of King Gong of the city of Yang.