What are the artistic features of Li Sixun Monument in calligraphy?

Li Sixun Monument was built in the eighth year of Kaiyuan in Tang Dynasty. Li Yong wrote an article and a book, and now he is in Xi 'an stele forest in Xi 'an, Shaanxi. Yang Shen said: "Li Beihai's Monument to General Yunhui is the best. It is full of praise from Yan Xu, just like "Lanting". But after the pen is released, it is bold and full, which is extremely charming. Just like Lu Xun's "Visit to the Next Dynasty", his elegant demeanor and lingering strategy are very meaningful. Saburo saw him and felt it.