在传世文献中 ,最早出现“清暑”一词的大约为东汉张衡的《西京赋》:长安西北 ,“其远则九甘泉 ,涸阴冱寒 ,日北至而含冻 ,此焉清暑”。三国吴薛琮注 :“其处常阴寒。日北至 ,谓夏至时 ,犹冱寒而有冻。帝或避暑于甘泉宫 ,故云清暑。”1 甘泉在今陕西省西安市西北约九十多公里 In the handed down literature, the earliest appeared “Qing Shu” is about the Eastern Han Dynasty Zhang Heng’s “Xijing Fu”: Chang’an northwest, “its far away Jiugen Oasis, dry Yin Yin cold, North Korea to contain frozen, this Yanqing heat”. Wu Xue Xuan of the Three Kingdoms Note: “It is often chilly.” To the north of summer, when the summer solstice, still cold and frozen. Emperor or summer in the Oasis Palace, so the cloud Qingshu. "1 Oasis in Xi’an City, Shaanxi Province, northwest About 90 kilometers