Introduction to Yang Xuxuanyu: "The Book of the Later Han·Yang Xu Zhuan" says: "Xu was the prefect of Nanyang... At that time, the homes of powerful people were often extravagant and beautiful, but Xu was very ill and often had little food, clothing, carriages and horses. He was defeated. The prime minister tried to offer him raw fish, but he accepted it and left it hanging in the court. The prime minister came in again, and he went out to hang it, so as to prevent his intention. "Praise to Yang Xu, an official in the Han Dynasty, who was an honest official and refused to accept bribes. historical allusions.