What are the characteristics of poetry in the early Northern Song Dynasty?

In the early years of the Northern Song Dynasty, there were mainly three schools: Bai Style, Late Tang Style and Kunxi Style. Their common feature was that they inherited the Tang Style and did not form the unique style of the Song Dynasty, so they could be called the inheritance period. "White style" mainly imitates Bai Juyi's shallow poetic style, but the result is often "easy to flow without deep warning" ("Summary of Sikuquanshu? Ride the province "). Yuan (954 ~ 100 1) is a poet with high achievement. He advocates that "the foundation and lotte should be the back, while the beauty of children should be the front" (two poems written by former Fucun), so his poems are strongly realistic. "Late Tang Style" is represented by "Nine Monks". In the late Tang Dynasty, Jia Dao and Yao He, who preferred sons to daughters, paid attention to quiet artistic conception, but they were often fragmentary and small. "Kunxi Style" takes Li Shangyin as an example, pays attention to phrasing and advocating truth, and its representative writers are Yang Yi, Qian and so on. The Quincy School was strongly opposed by Fan Zhongyan, Shi Jie and others. Although Fan and Shi did not use the title of poems, they also created some works with different styles, which made a certain contribution to the origin of Song tune.