The imperial seal is a treasure, which has always been a symbol of power succession or regime change. Unfortunately, it was lost in the genetic process. Later, in the early Qing Dynasty, Yongzheng used as many as 39 seals for "imperial edicts and imperial edicts". After careful selection, Emperor Gaozong appointed 25 of them as jade seals, which were stored in Jiaotai Hall, and the rest were sent to Shengjing Forbidden City. In other words, at the beginning of Yongzheng, there were as many as 39 jade seals, each of which had different uses, such as conferring the queen, or other ceremonies and imperial edicts.
Until Qianlong ascended the throne, it is said that he referred to the allusions in Zhouyi. "Zhouyi Dayan": "There are five days in twenty". In other words, I chose the 25-party national seal in the hope that the Qing Dynasty would last until the 25th century. Another theory is that Emperor Qianlong chose these 25 jade seals because he wanted to imitate the story of Ji Zhou. This story tells that after Zhou Pingwang moved eastward, the Eastern Zhou Dynasty began and lasted for 25 generations. It is the dynasty with the longest ruling time and the most dynasties in the history of China. He even changed countries and his political affairs were unstable. One day, his dynasty will be overthrown, but he is selfish and hopes that his dynasty will continue to rule like the Zhou Dynasty.
However, the law of history is not as he hoped. Even if Qianlong selected "25 jade seals", the most commonly used one was carved from wood, hoping to tell his descendants to pay attention to morality and not to take treasures too seriously. But in the end, the rule of the Qing dynasty was more than a dozen generations, which was doomed and could not be forced.