It is a kind of quatrain, which refers to a small poem with five words and four sentences. It conforms to the norms of metrical poetry and belongs to the category of modern poetry. There are two squares, one is convex and the other is horizontal. This style originated from Yuefu poems in the Han Dynasty and was deeply influenced by folk songs in the Six Dynasties. In the Tang Dynasty, it was like a twin sister with modern regular poetry, and it appeared in the poetry circle with brand-new brilliance. Five-word quatrains but twenty crosses can show a fresh picture and convey a true artistic conception. Seeing the big because of the small, there are always many small ones, and short chapters contain rich content, which is its biggest feature. Representative works include Jiang Xue by Liu Zongyuan, Bird's Singing Stream by Wang Wei, Sitting Alone in Jingting Mountain by Li Bai, Eight Arrays by Du Fu, Heron House by Wang Zhihuan and Farewell Master by Liu Changqing.
Five must be a poetic term. The Five Wonders in the Prosperous Tang Dynasty is the heyday of the creation of the Five Wonders in the whole Tang Dynasty. During this period, not only a large number of five-element poets emerged, but also many famous writers such as Li Bai, Wang Wei, Meng Haoran, Cui, Chu Guangxi, Wang Changling, Cui Hao, Du Fu and so on. Among them, Li Bai and Wang Wei are two masters recognized by critics in past dynasties.