《汉书·传·西域传下》
武帝很后悔远征之事。这时，搜粟都尉桑弘羊与丞相、御史对武帝说： 轮台以束捷枝、渠犁都是以前建国之地，土地广大，水草富饶。有灌溉田五千顷以上，气候温和，田地肥美，灌溉方便，种五谷和中原地区同时成熟。
上既悔远征伐，而搜粟都尉桑弘羊与丞相御史奏言： 故轮台东捷枝、渠犁皆故国，地广，饶水草，有溉田五千顷以上，处温和，田美，可益通沟渠，种五谷，与中国同时孰。
Emperor Wu regretted his distant expeditions very much. At this time, Sang Hongyang, the prefect of Sougu, the prime minister, and the censor said to Emperor Wu: Luntai, Yizhiji, and Quli are all places where countries were built in the past, with vast land and abundant water and grass. There are more than 5,000 hectares of irrigated fields, the climate is mild, the land is fertile, and irrigation is convenient. The grains and the Central Plains mature at the same time.