Zhang Xu (675 ~ 750) was born in Wuxian (now Suzhou, Jiangsu) in the Tang Dynasty. He is the commander of Changshu County and the long history of Jin Wu. It is famous for its cursive script, and it is also called "Three Musts" with Li Bai's poems and Pei Min's sword dance. Poetry is also unique, famous for its seven wonders. It ranks alongside Li Bai, He and others as one of the Eight Immortals. Together with He, Zhang and Bao Rong, they are called "four sons of Wuzhong". Calligraphy is as famous as Huai Su. Good sex wine, according to "Old Tang Book", every time you get drunk, you scream and go crazy, and writing is called Zhang Dian. It also shows that he is crazy about art and was called "the sage of grass" by later Buddhas.
Yan Zhenqing (August 23, 709-784), whose real name was Chen Qing and his nickname was Xianmenzi, was born in Fang Ying, posthumous title, Jingzhao Wannian (now Xi, Shaanxi), and his ancestral home was Langxie Linyi (now Linyi, Shandong). Yan Shigu V was a famous minister and outstanding calligrapher in Tang Dynasty.
In the 22nd year of Kaiyuan (734), Yan Zhenqing was a Jinshi, who was appointed as the censor and moved to the palace to assist the censor. Abandoned by Yang, an important minister, he was demoted to the plain satrap, and was named "Yan Plain". During the An Shi Rebellion. The rebels fought against the rebels. After Tang Suzong acceded to the throne, he worshipped the Minister of Industry and became a consultant in Hebei. To Fengxiang, he was awarded the title of minister of constitution, and later moved to imperial doctor. 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 framed by Prime Minister Qilu and sent to Li Xilie, the leader of the rebel army, to report, but he refused the thief in awe and was finally strangled.
Yan Zhenqing's calligraphy is exquisite, and he is good at writing and opening letters. He created "Yan-style" regular script, and he is also called "four masters of regular script" with Zhao Mengfu, Liu Gongquan and Ou Yangxun. Together with Liu Gongquan, they are called "Yan Liu" and "Yangu". He is good at poetry, and his works are rich, including poems, collections, Wu, Lu and Linchuan collections. The Song people compiled Yan Ji.