《论语·季氏》中有“夫颛臾，昔者先王以为东蒙主，且在邦域中矣，是社稷之臣也，何以伐为”的句子。高中语文第三册《教参》将句中的“先王”释为“鲁君”，说颛臾“是鲁君（先王）封的‘东蒙主’”。董秋成在《“先王”当作何解》一文中赞成《教参》的解释，认为“‘先王’ “The Analects of Confucius Ji Shi” has the sentence “Fei Ying, who was the king of the past and the king thought that he was the owner of the East, and he was in the state domain, and he was the minister of the community. Why did he cut it?” The third edition of the High School Chinese Language Teaching Reference “Reference to Teaching” interprets the “Prince of the King” in the sentence as “Lu Jun,” and says “Is the ”Eastern Mongolian Lord“ of Lu Jun (the first king).” Dong Qiucheng favored the interpretation of the reference in the article “What is the explanation for the ”Prince“?”