《汉书·志·五行志下之上》
历史上记载秦始帝二十六年，有巨人高五丈，穿的鞋有六尺长，都穿夷狄衣服，共十二人，出现在临洮县。
史记秦始皇帝二十六年，有大人长五丈，足履六尺，皆夷狄服，凡十二人，见于监洮。
The history records that in the twenty-sixth year of Emperor Qin Shi Huang, there were twelve people with a height of five zhang, wearing shoes with a length of six chi, all dressing in the clothes of the barbarians, appearing in Lintao County.