Engraving art is the art of making seals by combining calligraphy (mainly 篆书) and engraving (including chiseling and casting), which is a unique art form of Chinese characters. The engraving began in the pre-Qin Dynasty, Sheng Han, weak in Jin, defeated in Tang and Song, revived in Ming, and Zhongxing in Qing. It has a history of more than 3,700 years.