In the early years of the Western Han Dynasty, prose and ci fu developed greatly. Political essays by Jia Yi and Chao Cuo (such as On Qin by the former and On Shu by the latter). ) magnificent, practical and pertinent, eloquent, full of emotion and literary talent, which influenced the prose of later Tang and Song Dynasties. Although many imitations of Ci and Fu inherited the tradition of Sao style, Jia Yi's Pengniao Fu expressed his political ambition and showed traces of transition to Han Fu in form. Meicheng's Seven Hairs became the symbol of the formal formation of Han Da Fu.