What does "Xiao Li" mean among the poets of the Tang Dynasty?

Li Shangyin.

Li Shangyin (about 813-about 858), a famous poet in the late Tang Dynasty, was named Yishan, also named Yuxi (Xi) Sheng, and also named Fan Nansheng. He was originally from Hanoi, Huaizhou (now Qinyang, Henan), and his ancestors moved to Xingyang (now Xingyang City, Henan Province).

In the second year of Emperor Wenzong's reign (837), Li Shangyin became a Jinshi and served as Secretary, Provincial Secretary, Hongnong Wei, etc. Because he was involved in the political whirlpool of the "Niu-Li Party Controversy", he was marginalized and struggled throughout his life. In the late Dazhong year of Emperor Xuanzong of the Tang Dynasty (about 858), Li Shangyin died of illness in Zheng County. After his death, he was buried at the foot of Beishan Mountain in Qinghua in the east of his ancestral home, Yongdian, Huaizhou (now Wangzhuang Town, Qinyangshan Mountain).

Li Shangyin was one of the few poets in the late Tang Dynasty and even the entire Tang Dynasty who deliberately pursued poetic beauty. He was good at poetry writing, and his parallel prose was of high literary value. Together with Du Mu, he was called "Xiao Li Du" (to distinguish him from Li Bai and Du Fu's "Li Du"), and together with Wen Tingyun, he was called "Wen Li". His poems are novel in conception and beautiful in style, especially some love poems and untitled poems, which are sentimental, beautiful and moving, and are widely read.