What are the artistic features of Li's calligraphy?

Li, whose date of birth and death is unknown, was born in Kaiyuan (7 13 ~ 74 1) in Xuanzong of Tang Dynasty and Zhaojun (now Zhuoxian County, Hebei Province). He is the uncle of the poet Li Bai. Officials will be less supervised. He is the most famous seal script writer in the Tang Dynasty. His seal script works include Three Graves, Prajna and Chenghuang Temple. In addition, Yan Zhenqing's "Family Temple Monument" and other inscriptions were sealed by him.