In the early period of the Tang Dynasty, whether writers of
rhythmical parallel prose or initiators of ancient prose movement
examines the creative experience of the earlier dynasty from the political point of view according to practical needs for summing up cultural heritage of the previous dynasty. With the shaping of ancient prose,
rhythmical parallel prose evolved from an average form of writing to a particular form of writing, in the process of which writers of ancient prose made further criticism of rhythmical parallel prose as an average form of writing. The criticisms mentioned expedited the
transformation of rhythmical parallel prose from an average of writing to a particular style of writing. More stress was laid on political style in the criticism of rhythmical parallel prose in the Tang Dynasty, which was close to the criticism of "Four-Six" parallel writing as a particular style I the Song Dynasty. This means that a breakthrough had been made in the criticism of parallel prose in the Tang Dynasty.