After Qin Shihuang unified the world, cars were on the same track and books were in the same language. However, all the people in the imperial court thought that the name Xi was tacky, and it was also to show the great achievements of Qin Shihuang. It is clear that the seal used by the emperor is called "Xi", and the folks or princes still accept the saying of "Xi" and "Xi".
According to historical records, Ying Zheng, the first emperor of Qin Dynasty, had six seals that could symbolize the authority of the emperor-"Riding Six Seals", that is, three seals of the Emperor (Tianzi Seal, Tianzi Seal and Tianzi Seal), and the other three seals were not introduced much. In addition to these six seals, Ying Zheng also ordered Lisi to carve a square seal with bird and insect seal characters, which has no specific function and is carried with him for the purpose of attracting wealth and ward off evil spirits. After it was handed to Liu Bang, it was honored as the "national seal": whoever owns it can naturally become the real dragon emperor and take charge of the country.
According to records, the only national seal in the world, under the irradiation of sunlight, will show a strange and unreal colorful effect from all angles. Guo Chuan Xi experienced emperors in the Eastern Han Dynasty and was lost in a military disaster in the last years of Emperor Xian of Han Dynasty. From then on, there is only legend about it.
There were eight seals in the Tang Dynasty, all made of jade. In addition to the "seal of God" being a special existence showing the divine right of the monarch, the other seven seals show different functions according to relevant regulations, such as "seal of order" for offering sacrifices to gods, "seal of the son of heaven" for treating Siyi, and so on. When Wu Zetian was in power, she thought that the seal was close to the sound of "death", which was unlucky. She changed the king's seal to "treasure". After Su Zong acceded to the throne, he changed back and the tables turned. Later, she was changed to "Bao" by Emperor Xuanzong of the Tang Dynasty, and it became a custom.