《汉书·传·西域传下》
郑吉东到酒泉，向宣帝报告情况。宣帝命他回渠犁和车师屯田，大量积聚粮食，使西域各国安心，并准备打击匈奴。
东奏事，至酒泉，有诏还田渠犁及车师，益积谷以安西国，侵匈奴。
Zheng Ji went east to Jiuquan, and reported the situation to Emperor Xuan. Emperor Xuan ordered him to return to Qulei and farm in Cheshi, to accumulate large amounts of grain, to reassure the countries of the Western Regions, and to prepare to attack the Xiongnu.