What font is used to write Shang Yang's age?

Shang Yang's political reform was around 356 BC, and Shang Yang came from this period, that is, the Warring States period. It was established in the Qin dynasty in 22 1 BC, which was more than one hundred years behind! Seal script was used after Qin Shihuang unified the six countries and established the Qin Dynasty. During the Shang Yang period, languages in different countries were not unified. In terms of fonts, I think it should be the use of scripts.

There is an article on the Internet, you can read it yourself. It says, "If Li Si created Xiao Zhuan, Xiao Zhuan in Shang Yang period should be different from it. In the eighteenth year of filial piety, the inscription was Xiao Zhuan of Qin State, which contained essays or ancient prose from the Warring States period. "

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Textual research on Zhang's "Shang Yang Juan" in the Institute of Legal Ancient Books Arrangement of East China University of Political Science and Law