This allusion is about sacrificing one's own interests to help others. In the Ming Dynasty, a man named Xie Zhen was blind, but he was good at writing lyrics, which were widely sung among the people.
In the winter of the first year of Wanli, Sun personally received him. After a full meal, Sun asked his pet Jijia to play the piano and sing behind the curtain.
Jia Shi sang a Zhi Zhu poem written by Xie Zhen.
King Sun Mu, fascinated, only asked Jia to come out to see him. Jia was very beautiful, and then she sang all the lyrics she wrote. Xie Zhen was very happy and stood up and said, "What your wife sang was only superficial. I should rewrite some good words for your needs. "