Xiao Zhuan in Qin Dynasty laid a unified writing standard and found an opportunity of integration in the chaos. Standardize stippling, including stroke order, primary and secondary, etc. The foreign side is round, and Li was called a "pen tiger" in the Tang Dynasty. The reform of Xiao Zhuan increased its roundness, charm and ease, making it fly naturally, thus making it euphemistic, interesting and elegant, with elongated glyphs and well-proportioned trees.
The narrow sense of seal script only refers to Qin Zhuan, commonly known as Xiao Zhuan, while the broad sense of seal script refers to the ancient characters before Qin Zhuan. Generally speaking, during the nearly two thousand years of the popularity of seal script, great changes have taken place in font, style and brushwork-much greater than the changes in regular script later.
Generally speaking, the early characters are characterized by strong pictographs. The structure is natural, the size follows the shape, and the standardization and neatness are not emphasized. Pens are also lively and changeable, so they are unpredictable.
In the ink of Shang Dynasty and early bronze inscriptions, Jun Fang's writing style and sharp or wavy strokes are common, showing sharp edges and giving people a harsh, gloomy, intense and pleasant feeling.
The change of yin and yang and the principle of everything are fully reflected in the spatial distribution of seal script. Symmetry, balance, equidistant and center of gravity all reflect Xiao Zhuan's grasp of the laws of nature and conform to people's aesthetic mentality.
Pictographic characters, knowing characters, fingering and other word-making methods not only simulate the shape of mountains and rivers, but also simulate the shape of people's hearts, and strive to express a "legal image" in which foreign objects and people's hearts blend.