First, scarcity. China ancient paper and silk books are not easy to preserve. Besides, it is not easy for him to survive thousands of years of history, during which he experienced many floods, fires and wars. This product is unique and very rare in the world. Second: it cannot be copied. This includes two aspects. The first aspect is that this person is no longer alive, and the second aspect is that the artwork itself cannot be copied. Third, the blood should be pure. Wang Xizhi's roots are in Hong Miao, his noble background and calligraphy family. These three important factors are all taken by him. As we all know, Wang was indeed a noble family in Wei, Jin and Southern Dynasties. More than nine generations are famous calligraphers. And he was an official in all previous dynasties. His uncle Wang Dao, the official to the prime minister. His uncle Wang Dun was armed to the teeth. Fourth, personal cultivation. Wang Xizhi did put a lot of effort into calligraphy, with profound attainments and different talents. Fifth. There must be heavyweight fans. One of the most important fans is Li Shimin, Emperor Taizong. The emperor's preferences will affect the preferences of the civil and military ministers of the Qing Dynasty and the people of the whole country.