Dong Hejia's square small seal script writing method
After Qin Shihuang unified China (221 BC), he implemented the policy of "writing with the same text and carriages with the same track" and unifying weights and measures. It was led by Prime Minister Li Si He was responsible for simplifying the large seal script originally used by the Qin Dynasty, canceling the other Six Kingdoms scripts, and creating a unified Chinese character writing form. It was popular in China until the end of the Western Han Dynasty (about 8 AD), and was gradually replaced by official script. But because of its beautiful font, it has always been favored by calligraphers. And because its strokes are complex, its form is ancient, and twists and turns can be added at will, seals were carved in seal script, especially official seals that required anti-counterfeiting, until the fall of the feudal dynasty and the emergence of new anti-counterfeiting technology in modern times.