Zhang Yu, the name of an ancient county, was written by Wang Bo, a talented scholar in the Tang Dynasty, in Preface to Wang Tengting: "Zhang Yu is the old county, and Hongdu is the new house. The stars are divided into wings, and the earth is connected with Lu Heng. " The so-called Zhang Yu County, which is now Jiangxi Province, is also the concept of Zhang Yu in a broad sense. Zhang Yu in a narrow sense refers to the area around Nanchang today.