(1) Different sources of evolution:

1. Official script

Official script is basically evolved from seal script, which mainly changes the round strokes of seal script into square folds, because it is difficult to draw round strokes on wooden slips with paint, so the writing speed of official script is faster.

2. Regular script

Regular script evolved gradually from han li, which can be divided into Wei Bei and Tang Kai according to the period. Wei Bei refers to the style of calligraphy in Wei, Jin and Southern and Northern Dynasties, which can be said to be a transitional style from official script to regular script.

In a narrow sense, regular script refers to Tang Kai, which gradually matured after the Tang Dynasty. Its representatives are Ou Yangxun, Yu Shinan, Chu Suiliang and Xue Ji 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 four masters of regular script "Yan Liu Ou Zhao", the first three are in the Tang Dynasty. By the end of the Tang Dynasty, regular script had reached its peak and its style was too regular.

(2) The structural features are different:

1. The square shape of Lishu

is spread left and right, and the silkworm head starts to collect the pen dovetail, and the circle is turned into a square arc, and the painting is changed into a point, and the thickness change is strengthened.

2. Regular script

The figure is square and the strokes are straight, which can be used as a model. This kind of Chinese character font is correct, which is the modern popular handwritten orthographic Chinese character.

(3) The representative works are different:

1. Official script

In the Tang Dynasty, official script has always been divided equally among Han Zemu, Cai Youlin, Li Chao and Shi Weize.

Among them, Han Zemu is the first of the four schools, and his representative work of official script is "A Monument to the West Yue God". Shi Weize, known as "Shi Shi Lang", is the masterpiece "The Monument to the Great Wisdom Zen Master". Cai Youlin and Li Chao have few works handed down from generation to generation. In addition, the official script works in the Tang Dynasty are also famous, such as Xu Chen's View of Songyang and Tang Xuanzong's Shi Tai Xiao Jing.

2. Regular script

Ou Yangxun's Inscriptions on Liquan in Jiucheng Palace and Huadu Temple Monument, etc. Yu Shinan's Confucius Temple Monument, Chu Suiliang's Preface to the Wild Goose Pagoda.

Baidu encyclopedia-official script

Baidu encyclopedia-regular script