What are the characteristics of China ancient Li Beihai's calligraphy?

Li Beihai, namely Li Yong, lived in Fengyi for three years (AD 678)-Tianbao for six years (AD 747). He is 70 years old. He was a native of Jiangdu, Yangzhou. He once "glanced at the North Sea", so he was named. His words began with "two kings", but they can be both inside and outside. Li Houzhu said: "Li Yong was angry with the right general and lost his physique. "Just talk about what Li Yong is good at learning." "Xuan He Shu Pu" said: "Yong is good at calligraphy, and the cursive name stays. It's wonderful for a novice general to practice the law, but he got rid of the old habits and gained a new pen power. "Since the Wei and Jin Dynasties, inscriptions and stone carvings have been written in official books. After entering the Tang Dynasty, Li Yong changed his name to running script and became famous for a while. Later generations also wrote inscriptions with lines. The personality characteristics of Li Yong's calligraphy are obvious. The font is high on the left and low on the right, and the brushwork is vigorous and stretched, giving people a sense of danger. He opposes mechanical imitation and advocates innovation. He once said, "People like me who want to be vulgar will die if they learn. Ye Youdao Monument, Yuelu Mountain Temple Monument and General Yunhui Monument are his representative works. His brushwork is vigorous and powerful in Xu Xiasheng, giving people a bold and lively feeling. Su Dongpo and Mi Fei both absorbed some of his characteristics, and Zhao Mengfu in Yuan Dynasty also tried his best to pursue his brushwork, from which he got the realm of "graceful" calligraphy. He had a great influence on later generations. He can write poetry and calligraphy, especially regular script. At that time, Chinese and Korean clothes and many temples often gave them gold and silver, and asked him to write articles and memorials. He wrote hundreds of articles back and forth and got tens of thousands of touches. However, he is still loyal and cherishes talents. He often uses these family assets to help the poor, so that there is almost no savings at home. On one occasion, when Li Yong returned to his hometown, he saw a distant brother in rags, who was extremely poor because he came last for many times. Li Yong is very sympathetic to his brother's situation. In addition to providing him with living expenses every month, he also mails the classics and Four Treasures of the Study he needs at any time. Later, the elder brother boarded the official career, and was grateful to Li Yong. He sent someone to send him money, but Li Yong declined politely. Li Yong's inscriptions are often engraved by Fu Lingzhi, Huang Xianhe and Sheng Yuan Jishuo. According to the textual research of Yang Shen's "Dan Lead Record" in Ming Dynasty, these three people are probably also aliases of Li Yong. His works handed down from generation to generation include Yuelu Mountain Temple Monument and Li Sixun Monument, which are most valued by later generations. 1, Yuelu Mountain Temple Monument, also known as Yuelu Mountain Monument: running script. This tablet is as vigorous as the Li Sixun tablet. 2. The Monument to Li Sixun is also called the Monument to General Yunhui: The running script is a masterpiece of his running script, which has always been valued by future generations. Founded in the eighth year of Emperor Xuanzong of the Tang Dynasty (AD 720).