Many people say that Tang maverick, works are valuable and worth collecting. What can convince us?

Facts speak louder than words, nine points of evidence don't say ten words, I collected a few books, which have his ice and snow paintings and calligraphy, which is clear enough:

Among them, authoritative publishing houses such as China Federation of Literary and Art Circles Publishing House have published Large-scale Documents of the Centennial Founding of the Party, Centennial Masters, General History of China Art, Examples of China Art, An Introduction to China Art, People's Artists and China Art Ceremony, etc. He also appeared on the cover of China Art Examples, a special textbook for more than 2,000 Confucius Institutes around the world.