What movement did the idea of rule of law originate from?

Guan Zhong School mainly refers to the works of Guan Zhong or his school explained by Jixia Xuegong. In the traditional culture of rule of law in China, Qi's thought of rule of law is unique and is called Qi Legalist. Qi was a vassal state, the hero of the founding of the Western Zhou Dynasty, the ancestor Bo Yi, assisted Yu Shun, made rites as education, legislated as punishment, and established a system of combining etiquette and law.

Taigong sealed Qi, followed the custom with simple ceremony, made laws, made orders, and the combination of ceremony and law became the way of governing the country that Qi inherited without abolishing it.

Guan Zhong assisted Qi Huangong in governing Qi. On the one hand, he regards propriety, justice, honesty and shame as the pillar to maintain the country and publicizes the importance of moral education. On the other hand, he emphasized the rule of law, and both monarch and minister obeyed the law, which made him the first person to put forward the rule of law in the history of China.

By the Warring States Period, Qi had become the first ideological emancipation movement and the source of a hundred schools of thought contending in China's history, and a group of people who inherited and carried forward Guan Zhong's thought formed Guan Zhong School. Guan Zhong emphasized that the rule of law in law and education became the highest achievement of pre-Qin legalists. Influenced by Qi culture, Xunzi studied in Xia Ji Palace, and also trained two representatives of Legalism, Han Fei and Li Si.