Long Ge introduced: Long Ge refers to the price standards listed by painters for selling their works, also known as rune examples, rune contracts and pen lists, just like the remuneration for publishing articles. The advantage of making the Longge is that the price is clearly marked, the children are innocent, and Jiang Taigong fishes. Those who are willing to take the bait can also discourage some "cheapskates" and save a lot of energy. As early as the Ming Dynasty, Tang Yin, one of the "Four Houses of Wumen", said that "write a picture of a castle peak and sell it at leisure, so that the world will not be guilty of money", which is essentially an expression of gratitude.