This is a poem that Xia commented on Zhang, a poet in the Tang Dynasty, in Qu You Shi, saying that Zhang's "Fishing Songs" spread China's culture to Japan more than a thousand years ago through singing and fishing.
It is said that Emperor Ji 'e appreciated "Fishing Songs" very much after it was spread to Japan. He gave a banquet in Hemao Temple to compose poems, and the royal family, literati and celebrities gathered, all imitating Zhang Zuo's "Fishing Songs".