2. The development of Fu has gone through several stages: it first appeared in hundred schools of thought's essays and was called "short Fu"; Qu Yuan's "Sao Style" is a transition from poetry to fu, which is called "Sao Fu". The style of Fu was formally established in the Han Dynasty, which is called "Ci Fu". After Wei and Jin Dynasties, it developed in the direction of parallel prose, which was called "parallel prose". In the Tang dynasty, it changed from parallel style to regular style, which was called "law fu"; In Song Dynasty, Fu appeared in the form of prose, which was called "Wen Fu".
3. The famous poems are: A Fu by Du Mu, Luo Shen Fu by Cao Zhi, Autumn by Ouyang Xiu, Qian Chibi Fu by Su Shi and Yi Jiangnan by Yu Xin.