Because the Confucianism advocated by Confucius was incompatible with the political background of the time. At that time, there were many princes in the late Zhou Dynasty, and the country was not unified. The rulers of their respective countries were ambitious and wanted to conquer and unify the world. Therefore, Confucius advocated benevolence and righteousness. Confucius, who admired the Zhou Dynasty, was not reused by the kings of various countries, so he lived among various countries. As the saying goes: If you plant flowers intentionally, they will not bloom, but if you plant willows unintentionally, they will create shade.