Abstract
The event that King Kuai of Yan demised the crown to his premier Zizhi, is a tentative way of political power transmission happened in the social transforming Warring States Period, which was influenced by the popular theory of Yao and Shun’s demise of that time. However, this tentative was obviously a failure, coming under attacks from all Confucian, Taoist and Legalist scholars. We may understand the development of the thinking concerning the issue of political legitimacy during the Warring States Period by analyzing the different commentaries by different schools on this unusual event, and get some beneficial inspirations.