《汉书·传·西域传上》
他们听说康居不拜漠使，单子就感到自己事奉汉太低下了。应当让康居的侍子回去，并与康居不再通使，这样可表明我们汉朝不与无礼义之国相往来。敦煌、酒泉小郡和南道八国，要供给往来使者的人和马、驴、骆驼的饮食，都很困苦。
敦煌、酒泉小郡及南道八国，给使者往来人、马、驴、橐驼食，皆苦之。
They heard that Kangju didn't bow to the emissary from the Mo, and Shanyu felt that his service to Han was rather degrading. They should let the attendant from Kangju return and no longer have exchanges with Kangju, which would show that we Han did not associate with those who lacked manners. Dunhuang, Jiuquan, and the small commanderies and eight nations on the southern route, in providing food to passersby and horses, donkeys, and camels, all endured hardship.