In the original text, there are people who hide Dai Song's "Bullfighting". They are bound by their hints, out of objectivity. A shepherd boy beside him said, "The bullfighting power is in the front and the tail is between the two stocks;" What's wrong with this painting? " Yellow painted a flying goose, revealing the neck and feet. Or: "A bird will show its feet when it shrinks its neck, and it will show its neck when it shrinks its foot, so there is no second exhibition." The test is true.