First of all, antithesis can achieve a unique aesthetic effect. In ancient poetry, antithesis can enhance the beauty of phonology, rhythm and language. For example, in "Delighting in Rain on a Spring Night" written by Du Fu, a famous poet in the Tang Dynasty, the phrase "Tears are like rain when leaving, and I hate not to leave when I enter" is skillfully used to make the whole sentence rhythmic and fascinating.
Secondly, duality can strengthen the expression effect of text and meaning. Contradiction can make sentences closer to the theme and highlight cultural connotation. For example, in the famous poet Bai Juyi's Biegu Plain Grass in the Tang Dynasty, the phrase "the vast grass crosses the plain and comes and goes with the four seasons" corresponds "grass" and "glory" in the form of confrontation, and puts the natural cycle of life and the departure of life in it, which is more poetic and far-reaching.
Antithesis can also make ancient poetry memorable and legendary. The aesthetic feeling of antithesis will often enhance the distinctive features of ancient poetry, enhance the sense of rhythm and rhythm, and make it easier for readers to remember the whole poem. For example, Wang Zhihuan, a famous poet in the Tang Dynasty, wrote in "In the Lodge of the Heron", "How many hours have you been lying in the wilderness with one sword?". The mode of combining peace and war not only keeps the characteristics of ancient poetry, but also leaves a deep impression on poetry, which has been passed down to this day.