Li Si
The script of the Qin system (the writing as exemplified in bronze inscriptions in the state of Qin before unification) had evolved organically from the Zhou script starting in the Spring and Autumn period. Beginning around the Warring States period, it became vertically elongated with a regular appearance. This was the period of maturation of Small Seal script. It was systematized by prime minister Li Si during the reign of the First Emperor of China Qin Shi Huang through elimination of most variant structures, and was imposed as the nationwide standard. Through Chinese commentaries, it is known that Li Si compiled the "Cangjiepian", a partially-extant wordbook listing some 3,300 Chinese characters in small seal script. Their form is characterized by being less rectangular and more squarish.