Judging from the current data, a large number of silk books and bamboo slips unearthed from Mawangdui Han Tomb can best represent the changes of characters in the early Han Dynasty. The combination of yin and yang is a bamboo slip unearthed from Mawangdui No.3 tomb. The owner of Mawangdui Tomb 3 died in 200 1 year, that is, in 288 BC, only 38 years before the founding of the Han Dynasty. Unearthed in the same tomb as He Yinyang are four kinds of bamboo slips with different contents, such as Ten Questions, A Talk on the Right Way in the World, Miscellaneous Recipes and Jice, as well as other silk books. There are three or two bamboo slips in Yin He Yang, which are about two or three centimeters long and more than one centimeter wide. There are more than twenty characters on each bamboo slips, and their contents are descriptions of specific skills of indoor health preservation, belonging to medical slips. These bamboo slips are very wide, which is convenient for using calligraphy skills when writing. These bamboo slips are also highly accomplished in calligraphy itself. Judging from the strokes, the writers of this set of bamboo slips can mix rigid and flexible strokes at will. For example, his horizontal paintings, like the characters in Mawangdui No.1 tomb, They all pay attention to pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy, pointy. Judging from the text configuration, the palace is compact, stretching left and right, avoiding left and right, echoing up and down, and looking forward to love. Especially in the place where the waves are swaying, it is full of energy and full of pitching, which has a special meaning of wonderful changes. From the overall layout, a simple black-and-white layout is natural, sparse and elegant, and looks colorful and pleasing to the eye, without craftsmanship. Therefore, no matter from which aspect, the calligraphy art of these bamboo slips is the best in the calligraphy art of Han bamboo slips.