《汉书·纪·元帝纪》
二月，诏令丞相、御史举荐质朴、敦厚、谦逊有高行的人，光禄每年按此内容考校郎、从官而定其等级。
二月，诏丞相、御史举质朴敦厚逊让有行者，光禄岁以此科第郎、从宫。
In the second month, the Emperor decreed that the Imperial Chancellor and Excellency were to recommend honest, genuine, modest and morally upright people as the Guanglu was to examine the Gentlemen and Secondary Officials every year on this basis and decide their grade.