Then it can only be Cheng Miao
Cheng Miao, a calligrapher of the Qin Dynasty. The courtesy name was Yuan Cen, a native of Xiagui (now north of Weinan, Shaanxi).
According to legend, he was the first to reform seal script into official script. Cai Yong said that "
Deleting ancient texts and establishing official texts". Zhang Huaiguan of the Tang Dynasty said in "Shujuan": "It is said that Miao was good at big seal script. He was the jailer of the county at the beginning. He offended the First Emperor and was imprisoned in Yunyang Prison. Tan thought about it for ten years, and the square and round strokes of the big and small seal scripts were lost and lost, and he became the official script of three thousand characters. He was called good, and his crimes were exonerated and he was used as a censor, so that it was convenient for officials and prison officials to assist in writing, so it was called "official script".
Clerical script is a watershed in the development of ancient Chinese writing. It laid the foundation for the development of cursive script and so on. Cheng Miao's "Qin Yushi Cheng Miao Shu" is also included in the Song Dynasty's Daguan Tie.