In the history of dynasties, Bao, the symbol of maintaining its feudal dictatorship, has been inherited or engraved from Qin Shihuang to Qing Dynasty. The treasure seal system founded by Qin Shihuang was completely inherited by Liu Bang, the emperor gaozu of Han Dynasty, and later became the so-called "Eight Seals System in Qin and Han Dynasties". This system also ran through the whole Wei, Jin, Southern and Northern Dynasties and Sui Dynasty. They not only inherited the Eight Prints system in Qin and Han Dynasties, but also had no difference in specifications, names, new styles and characters. It was not until Wu Zetian proclaimed himself emperor in the Tang Dynasty that a seal of "Emperor Tianjing was virtuous and prosperous all his life" was added, and eight printing was changed to nine printing, and at the same time "seal" was changed to "treasure". Since then, all generations have called it "treasure". It increased to twelve treasures in the Northern Song Dynasty and seventeen treasures in the Southern Song Dynasty. The Ming Dynasty soared to twenty-four treasures. In addition to daily use, the twenty-five treasures of Jiaotai Hall were also enshrined in the Qing Dynasty as "Ten Treasures of Shengjing". It can be seen that there are more and more treasure seals in the past dynasties, and the volume is getting bigger and bigger, from one inch two to four inches in Qin and Han Dynasties, to two to four inches in Tang Dynasty, to two to five inches nine in Ming and Qing Dynasties. The biggest is the "treasure of destiny" in the Song Dynasty, which covers heaven and earth, praises the gods, protects harmony and lives longer.