Li Shangyin's "Seven Laws" restored and developed Du Fu's tradition of paying attention to the national luck and sentimental current affairs, created a new means of singing history and reflecting current affairs, and significantly improved the satirical art of "Seven Laws". He wrote a special lyric poem "Untitled Seven Laws", which greatly improved the art of expressing the soul of the seven laws, and thus made great innovations in content and art. His seven laws are elegant and exquisite, ethereal and beautiful, and have their inherent unity in affection and tenderness.