Seal script can be said to be one of the oldest but youngest calligraphy. China characters originated from hieroglyphics and are firmly rooted in hieroglyphics, instead of simply using sound symbols to write records. Hieroglyphs themselves have modeling requirements, so Chinese characters are artists' works from the beginning. Since the earliest Oracle Bone Inscriptions, this kind of hieroglyphics has been called seal script.
Oracle Bone Inscriptions has obvious pictographic traces, and his strokes can be added and subtracted at will, so he can't be regarded as a mature writing. From then on, the inscriptions on bronzes, such as Zhong Ding and Shi Guwen, were collectively called Da Zhuan.
The standardization of characters is further strengthened, the shape and composition of characters are more regular, and the vocabulary is increased, so there can be a long inscription. It was not until the Qin Dynasty unified the whole country that Lisi advocated "writing in the same language" and completely standardized the writing method of seal script, which was called Xiao Zhuan.
Oracle Bone Inscriptions should be said to be a writing system that is not yet fully mature, and it also retains a large number of pictographic elements, so it is somewhat arbitrary to add or subtract strokes, and there are still many commonly used words under the guise. Therefore, when you appreciate oracle calligraphy's creation, you will find it difficult to create long poems unless you create your own words.
The masters of this sect, Jin Wen and Shi Guwen, both belong to Da Zhuan, which is the difference between them and Xiao Zhuan in Qin Dynasty. This writing style prevailed in the Western Zhou Dynasty about 3000 years ago. Now we can mainly see the inscriptions on bronzes, such as bells and ding. Bronze was called gold in ancient times, so it was also called "Zhong Dingwen", or "Ji Jin Wen" and "Kuan Wen Zhi".