Generally speaking, seal script includes all the characters before official script and their extended genera, such as Oracle Bone Inscriptions, Jinwen, Shi Guwen, the ancient prose of the Six Kingdoms, Xiao seal, Miao seal, overprint and so on. Narrow sense mainly refers to "Da Zhuan" and "Xiao Zhuan".
The font of seal script is round and the structure conforms to the meaning of six books, so Sun said in the Tang Dynasty, "Seal script is graceful and smooth". The ancients believed that seal script was written by Cang Xie, but this is not credible.
The generation of a kind of writing needs a long development process, and it is impossible for a person to complete it in a short time.
Dazhuan refers to Oracle Bone Inscriptions, Jinwen, Jinwen and Six Kingdoms, and retains the obvious features of ancient hieroglyphics.
Seal script declined after Wei and Jin Dynasties, with Li as the representative in Tang Dynasty.
The calligraphy of seal script in Qing Dynasty ushered in the second peak of creation, and a large number of outstanding seal script writers such as Wang Shu, Qian Zhan, Deng, Zhao and Wu Changshuo emerged.
After the founding of New China, the representatives of seal script are Qi Baishi, Wang Fuan, Jian Jinglun, Xiao Tuian, Zhang Taiyan, Huang Hongbin, Rong Geng, Lai Chusheng, Deng Sanmu, Lu Zhaowei, Shang Chengzuo, Pan Zhulan, Liu Zidu, Jiang Weisong, Sha Manweng, Xu Wuwen, Yan Gongda, Cong Wenjun, Zhu Gong, Qiu Gaochi and Wang Youyi.