《三国志·魏书·王卫二刘傅传》
刘劭上疏说： 官员们的考核，是国家重要的事情，但历代以来都不看重，所以国家法典有缺漏却没有弥补，因此官员的好坏和能力高低都混合在一起。
劭上疏曰： 百官考课，王政之大较，然而历代弗务，是以治典阙而未补，能否混而相蒙。
Liu Shao's submitted memorial stated: Evaluation of officials is an important matter for the country, but historically it has not been given much importance, which is why there are omissions in the country's laws that have not been amended, and therefore there is a mix of good and bad officials as well as high and low abilities.