《三国志·魏书·王卫二刘傅传》
留存下来的关于礼仪的记载，只有周典，里面对外封定侯伯，以护卫王室，在朝中设置百官，完善治﹑教﹑礼﹑政﹑刑﹑事六种职事，土地有一定的税赋，官员有一定的准则，百官各司其职，百姓各安其业，所以考核的成绩就能比较，那官员的升降任免也就简单了。
礼之存者，惟有周典，外建侯伯，藩屏九服，内立列司，筦齐六职，土有恒贡，官有定则，百揆均任，四民殊业，故考绩可理而黜陟易通也。
The surviving records on etiquette are only Zhou Dian, in which the princes and marquises are appointed outside the territory to protect the royal family, and the court officials are established to complete the six functions of government, education, etiquette, politics, punishment, and affairs. The land has its taxes, the officials have certain criteria, the officials have their own duties, and the people have their own professions. Therefore, the results of the assessment can be compared, and the promotion and demotion of officials will be easier.