2. Seal script, after Qin Shihuang unified China (22 1 year ago), the policy of "homonym, car on the same track" was implemented, and unified measurement was responsible. On the basis of the original seal script used by Qin, it was simplified, and the other six characters were cancelled, creating a unified Chinese 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.