工之侨献琴有一个名字叫工之侨的人得到一块上好的桐木，砍来做成了一把琴，装上琴弦弹奏起来，发声和应声如金玉之声。他自认为这是天下最好的琴，就把琴呈现给太常寺的主管人，主管人让优秀的乐师来看，乐师说：“这个琴不是古琴。”于是便把琴退还回来。
After a year， he dug it up and carried it to the market. A high official passed by and saw Qin. He bought it with a lot of money and presented it to the court. Music officials passed on the appreciation， saying: “This is really a rare treasure in the world!”
