Gongsun Long 公孫龍 is known as a philosopher of the school of dialecticians (mingjia 名家). He was a retainer of Lord Pingyuan 平原君 from Zhao 趙, but also served as an advisor to King Zhao of Yan 燕昭王 (r. 311-279). One story in the Shiji 史記 says that when Yu Qing 虞卿 suggested offering Lord Pingyuan a territory because Lord Xinling had liberated the city of Handan 邯鄲, Gongsun Long persuaded Lord Pingyuan not to accept the unjustified merit. This episode demonstrates Gongsun Long's feeling for right and wrong, just as he explained in his philososophical theories.