What are the characteristics of Wang Anshi's poems?

As far as the poetic style is concerned, Anshi's ancient poems mostly use classics and arguments, but like Qu and Taoyuan Xing, they have novel ideas, rich feelings and rich imagination. Rhyme, on the other hand, is steady and appropriate, but sometimes it is inevitable to lose too much carving. Five musts and seven musts are especially famous. "Wang Banshan has many styles and is good at quatrains" (Hanting Poem) and "Gong Jing's quatrains are amazing in the world" (Boat House Poem). His poems have great influence on contemporary and later generations, and are called "Wang Gong Jing Style" (Yan Yu's Poems on Canglang).