本文通过对《史记.西南夷列传》中关于公元前135年汉使唐蒙与南越番禺人的对话“道西北牂牁江,江广数里,出番禺城下。”以及“夜郎者,临牂柯江,江广百余步,足以行船。”的细考与分析,用大量的史料证实了牂牁江就是乌江,夜郎国的中心在乌江河畔的思南这一重要史实。 This article through the “Historical Records. Southwest Yi Biography” about the 135 BC Han Dynasty Tang Meng and South Panyu people’s dialogue “Road northwest Qionglai, Jiang Guang number, out of Panyu city. ” And , Provisional Ke Jiang, Jiang Guang hundred steps, enough to travel. "The examination and analysis, with a large amount of historical data confirmed the Qionglai River is the Wujiang, Yelang state center in the Wujiang River Sinan this important historical facts.