During the Wei and Jin Dynasties, calligraphy, calligraphy and cursive script all developed rapidly, and a large number of famous calligraphers emerged, such as Zhong You, "Two Kings" and Zhang Menglong. And the script even appeared the world's first running script "Preface to Lanting", which can be said to be a strong development period in the history of China calligraphy; In the Tang dynasty, calligraphy strokes were rounded and frustrated, and most of them turned sideways, showing their sharpness. Most of them are square, neat and not rigid, and there is a realm of beauty in solemnity. For example, Xu Hao's Song Yangguan Monument, Zhang Tingsi's epitaph unearthed at 1977, and his son Xu Xun's Epitaph of Cui Xiangyou Fu, etc.