At the beginning of the official script, it reads: Chu, a left-handed knife, and a right-handed knife.
official script, such as Qin Li and han li, is generally believed to be developed from seal script, with wide and flat glyphs, long horizontal paintings and short vertical paintings, and pays attention to "silkworm head and goose tail" and "twists and turns".
according to the unearthed bamboo slips, official script originated in the Qin dynasty, and it is said that Cheng Miao was an official, and han li reached its peak in the Eastern Han Dynasty, inheriting the tradition of seal script and opening the Wei, Jin, Southern and Northern Dynasties, which had a great influence on later calligraphy, and the calligraphy circle was called "han li Tang Kai".
Since the mid-Western Han Dynasty, the independent form of official script (including structure and stroke writing) has been completely formed. Typical examples are the bamboo slips that appeared in the quicksand of the Western Han Dynasty in the first year of Xuandi Wufeng (the first 57 years), the first year of Chengdi Heping (the first 28 years), the first year of Xingmang's founding Tianfeng (the 14th year), the inscriptions on lacquer plates unearthed from Han tombs in Le Lang in the 4th year of Emperor Pingdi of the Western Han Dynasty (the 4th year) and the 12th year of Emperor Yongping of the Eastern Han Dynasty (the 69th year).
Not only is the structure completely changed, but also the shape is square or oblate, and the long wave of the pen gesture is more natural, which is greatly different from the vertical shape close to the seal character.
Li bian is an important calligraphy cultural event in the history of calligraphy in China. The internal motivation of the official change was to adapt to the requirements of the social development at that time for the application of characters. "Li change is mainly manifested in two aspects: one is the change of font structure, which is not only the transformation of the font structure of regular seal script, but also the main direction of this transformation is simplification; The second is the change of writing style, which is not only to change the writing style of the original regular seal script, but also to make it simple and convenient.