In the art dealer's shop, the old gentleman picked up the old painting once again. He looked it up and down, left and right. He held it up, contemplating it for a few minutes. His eyes opened wider and wider. Finally, he turned to Shaxiao, the Little Silly, a rag boy who stood nearby, and said: "Sell this painting to me. I'll pay a lot of money, enough for your family to live on for a hundred years!". Surprisingly, Shaxiao replied, "Sir, I'm sorry. I can't sell it to you..."