63–66  For thousands of years, Chinese artists have used a material called lacquer to prevent the surfaces of objects made of wood or other materials from being damaged. Many beautiful lacquer pieces can be found today in collections of Chinese art.The process of producing a lacquer piece, however, is both difficult and long. To begin with, the original object must be made, perhaps a wooden bowl or vase with a design carved in its surface. Meanwhile, farmers collect raw, liquid lacquer from lacquer trees, each of which can produce only a small amount. After enough lacquer has been collected, a lacquer artist must then clean it by passing it through cloth and also beat it in order to remove excess water. The original color of the lacquer is not attractive so the artist next adds some other material to change the color to red or black. Now, the artist can put the first of many layers of lacquer onto the surface of the object. After the first layer is dry, he must polish it and then apply the next layer. When the last layer has been applied, the object will not only be beautiful, but also safeguarded against damage.
63. What is this passage mainly about?
(A) Collections of Chinese Art
(B) The Value of Lacquer Trees
(C) Evaluating artists’ skills
(D) Making of lacquer pieces