Zhenwen. It is a script used by the ancient Qin State, and is also known as Dazhuan, Zhouzhuan, Zhoushu, and history books. Because there are 223 characters in the "Shi Zhou Pian" written by the Qin people in the Spring and Autumn Period, it is called Zhou Wen. This type of writing was used until Qin unified the six kingdoms, and Qin Shihuang destroyed the six kingdoms and unified China. Its territory was vast and there were many state affairs, and the documents became increasingly complex. It was very difficult to use the original writing. In addition, the original writings of Qin, Chu, and Qi The seven kingdoms of Yan, Zhao, Wei, and Han had different writing styles and languages, and they were in urgent need of unification. He ordered his ministers to create new styles of writing. Therefore, Prime Minister Li Si wrote "Cangjie Pian" and created Xiaozhuan, also known as Qin Zhuan.