Why is "Five Oxen" one of the ten most famous paintings in China? What are the characteristics of this painting?

Can be called a heirloom painting should have its rarity, "Five Cows" is the oldest existing paper painting, so in this regard, is not comparable to other works Picture in order to? Cows? This is rare in ancient times, so the painting has a unique perspective on the subject matter. The use of lines is also unique, and in traditional painting, line drawing has a unique artistic value The expression of the painting is that the five cows are arranged horizontally, and Han Hwang focuses on the modeling and charisma of the five cows, and doesn't use too much scenery to set off the five cows.