Briefly describe the artistic characteristics and influence of Li Shangyin's untitled poems.

A: Artistic features: ① In the love chapter, people's bleak experience of social life is integrated, reflecting a sense of trance and anxiety. (2) Use metaphors, personification, symbols, puns and other techniques to express love feelings, create a sentimental artistic conception, and make people feel helpless and sad when experiencing the greatness and beauty of love. Influence: Li Shangyin's Untitled poem has a great influence on later poems. His sentimental sentiment, exquisite beauty, euphemistic meaning and melancholy are all characterized by lexicalization, which has built a bridge between poems and words.