《史记·七十列传·平原君虞卿列传》
第一次拜见赵王，赵王便赐给他黄金百镒，白璧一对；第二次拜见赵王，就当上了赵国的上卿，所以称他为虞卿。
一见，赐黄金百镒，白璧一双；再见，为赵上卿，故号为虞卿。
When he met King Zhao for the first time, King Zhao granted him 100 ounces of gold and a pair of white jade bi. When he met King Zhao for the second time, he became the highest-ranking minister of the State of Zhao, so he was called Yu Qing.