Regular script is also called regular script, real script and official script. It gradually evolved from official script, becoming more simplified and more horizontal and vertical.
Now commonly known as regular script, it evolved from Han Li, and can be divided into Weibei and Tang Kai according to the period.
The representatives of Tang Kai are Ou Yangxun, Yu Shinan, Chu Suiliang and Xue Qi in the early Tang Dynasty, Yan Zhenqing in the middle Tang Dynasty and Liu Gongquan in the late Tang Dynasty. We often say that the top three of the four masters of regular script "Yan Liu Ouzhao" were in the Tang Dynasty. The latter is Zhao Mengfu in the late Song Dynasty and early Yuan Dynasty.
The face above is the calligraphy of Yan Zhenqing in the middle Tang Dynasty.