Lishu, also known as han li, is a solemn font commonly used in Chinese characters. Its writing effect is slightly wide and flat, with long horizontal painting and short vertical painting, showing a rectangular shape, and paying attention to "silkworm head and goose tail" and "twists and turns". Lishu originated in the Qin Dynasty, formed by Cheng Miao, and reached its peak in the Eastern Han Dynasty. Calligraphy is known as "han li Tang Kai".