Previously, scholars have noticed that the Tang Anthology has the form of one set, two or more sequences, but the so-called “post-order” texts are in fact quite diverse, and even the compilation may not all be attributed to the end of the collection, and the use of this concept in the Tang and Song Dynasties was not very rigorous. The generation process of the Tang anthology is complex, and there are not only the first formers, but also the re-compilation and accumulation formers, and the formation of the characteristics of the post-order style is closely related to it. Subsequently, the Song people were very diligent in sorting out the works of the Tang Dynasty, and many Tang anthologies also underwent changes in the form of books from written to published books in the Song Dynasty, and during this period, the style and function of the later order also underwent new developments. The extant Li Baiji systematically preserves many textual examples of the later order of the Tang and Song dynasties, and further clarifies the internal evolution of the transmission mode from the Tang to the Song Dynasty by focusing on the changes of the post-order style in the manuscript circulation and the conversion of writing and printing, and the evolution trajectory of the transformation from the post-order to the Bawen script, and analyzing the reasons.