Wen Yiduo put forward the famous thought of "three beauties" in Poetic Metrics, namely, "the beauty of music (the beauty of syllables), the beauty of painting (the beauty of rhetoric) and the beauty of architecture (the beauty of symmetrical sections and neat sentences).
"。 It was put forward in view of the scattered form of new poetry at that time. This proposition laid the theoretical foundation of the new metrical school and made some contributions to the development of new poetry. Therefore, the crescent school is also known as the "new metrical poetry school". The crescent school corrected the weakness of the early poetry creation which was too informal, and also made the new poetry enter the period of independent creation.