《汉书·传·西域传上》
东到西域都护治所乌垒城四千零三十一里，北到康居卑阗城一千五百一十里，西南到大月氏六百九十里。
东至都护治所四千三十一里，北至康居卑阗城千五百一十里，西南至大月氏六百九十里。
4,031 li to the west of the Protectorate of the Western Regions in Wulei City, 1,510 li to the north of Kangju Beitian City, and 690 li to the southwest of Dayuezhi.