The measuring instruments of the Qin Dynasty unified weights and measures and the iron plate engraved with the emperor's edict to unify the measurement instruments. The writing style is basically Xiaozhuan, but each character is made into a square shape and is folded with a square pen. The purpose is to be practical. The writing seems careless, with different sizes. The characters are rectangular, with rows and no columns, staggered, natural and realistic, interesting and colorful, and have high artistic value. In addition, the small seal characters on Qin Wadang all have a square fold style, which is consistent with the imperial edict calligraphy. The second is a bamboo slip from the Qin Dynasty. In 1975, more than 1,100 bamboo slips with ink calligraphy were unearthed from the Qin tomb in Suihudi, Yunmeng, Hubei Province. The calligraphy style is typical of Qin Li, and they were relics from about five or six years after Qin Shihuang unified the country. The shape of the small seal script still remains, but some radicals of the seal script have been changed to official writing. The wave-picking strokes on the pen have begun to take shape. The structure is traditional, the font is thick and thick, and the width is only half a centimeter. However, the font is full, the pen is small and strong, and it has the appearance of large characters, which shows the author's superb and sophisticated ability to control the brush.