《资治通鉴·魏纪·魏纪一》
秦焚毁书籍，坑杀儒生，汉朝兴起后，有些学者开始推演金、木、水、火、土五德的相生相克，认为秦朝的帝位是不正统的 闰 位，在 木德 和 火德 之间，能够称作 霸 ，却不能称 王 ，于是兴起了 正 和 闰 ，即正统与非正统的争论。
秦焚书坑儒，汉兴，学者始推五德生、胜，以秦为闰位，在木火之间，霸而不王，于是正闰之论兴矣。
The Qin Dynasty destroyed books and executed Confucian scholars. After the rise of the Han Dynasty, some scholars began to deduce the generation and restraint of the five virtues of gold, wood, water, fire, and earth, and believed that the throne of the Qin Dynasty was not orthodox, and it was between "wood virtue" and "fire virtue". It can be called "tyrant", but it cannot be called "king", so the debate about "positive" and "leap" (orthodoxy and non-orthodoxy) arose.