After Emperor Wu of the Han Dynasty, the feudal dynasty of the Western Han Dynasty gradually turned into a period of decline, and the literature in the late Western Han Dynasty also showed a state of stagnation or decline. General political papers (such as recitation) are mostly covered with mysterious Confucian classics, pedantic and dull, and rarely angry. When Xuan Di proclaimed himself emperor, Huan Kuan cut and sorted out The Theory of Salt and Iron according to the documents of the six-year salt and iron conference in Zhao Di, which is the only valuable work. It not only reflects many important political and economic issues in the mid-Western Han Dynasty, but also has novel forms and clean and fluent language. Through dialogue and debate, he also portrayed an unrealistic and pedantic image of Confucian scholars. Liu Xiang wrote a book, citing historical legends or fables to illustrate some fragments of Yi Li and a few political papers or academic articles has certain value. Xuan Di's story of filial piety to Emperor Wu is also good at ci-fu. He thinks that "the big ci-fu is synonymous with ancient poetry, and the small one is beautifully argued", so ci-fu is very popular. Wang Bo and Liu Xiang are both famous authors. In fact, ci fu at this time has become the entertainment of emperors and nobles, such as advocating excellent games, which is of little literary value. This can be seen from Wang Bao's Dong Xiao Fu.