Who is the famous calligrapher who practices calligraphy with a brush and yellow mud as ink?

Yan Zhenqing is a famous calligrapher with a brush and yellow mud as ink. Yan Zhenqing's calligraphy is exquisite, and he is good at writing. Chu Suiliang, a beginner, studied under Zhang Xu and got his brushwork. Its regular script is dignified and majestic, and its running script is vigorous and powerful, which has created a "Yan style" regular script and has a great influence on later generations. Together with Zhao Mengfu, Liu Gongquan and Ou Yangxun, they are also called "four masters of regular script". Together with Liu Gongquan, they are called "Yan Liu" and "Yangu".

Yan Zhenqing (August 23, 709-784) was born in Jingzhao Wannian (now Xi City, Shaanxi Province) and Linyi (now Linyi City, Shandong Province). Yan Shigu V was a famous official, calligrapher and secretary supervisor in the Tang Dynasty. He was once a famous painter such as Sun and Situ.

Yan Zhenqing, a native of Langya Yanshi, was a scholar in the 22nd year of Emperor Xuanzong of Tang Dynasty (734). He used to be the censor and an assistant in the temple. Later, because he offended Yang, the powerful minister, he was demoted to be the prefect of the plain and was called "Yan Plain" by the world. During the Anshi Rebellion, Yan Zhenqing led the rebels to fight against the rebels and once recovered Hebei. Later, he went to Fengxiang and was made a minister. When Tang Daizong was an official, he went to the official department of Shangshu Province, and a prince and a surname named him Duke Lu, which was called Duke Yan Lu in history. In the first year of Xingyuan (784), he was sent to tell the rebel Li Xilie that he refused the thief in awe and was finally slapped to death. After he was killed, Cao's heirs and soldiers of the three armed forces cried. Posthumous title Si Tuleideng, posthumous title "in the text".