《汉书·纪·平帝纪》
征天下能精通逸经、古纪、天文、历算、钟律、小学、史篇、方术、本草以及《五经》、《论语》、《孝经》、《尔雅》教授的，从所在地乘传车，派到京师。到京师数千人。
征天下通知逸经、古记、天文、历算、钟律、小学、《史篇》、方术、《本草》及以《五经》、《论语》、《孝经》、《尔雅》教授者，在所为驾一封轺传，遣诣京师。至者数千人。
Those who were proficient in Yijing, ancient history, astronomy, calendar calculations, phonology, philology, history, techniques, Materia Medica, as well as the Five Classics, The Analects, The Classic of Filial Piety, and Erya were transported from all over the world to the capital by imperial carriages. Thousands of people arrived in the capital.