Coated with green glaze, celadon is a major type of porcelain produced in China. Celadon was first produced in the Eastern Han Dynasty (25-220) and the product at that time had pure color and a transparent and luminous appearance. In the Jin Dynasty (265420), Yue Kiln, Wu Kiln, and Ou Kiln had been in large scale. In the Song Dynasty (960-1279), the celadon tea set produced in Ge Kiln in Longquan, Zhejiang Province, one of the top five kilns at that time, reached its zenith and was sold to many places far and near. In the Ming Dynasty (1368-1644), celadon tea set gained great fame at home and abroad depending on its fine and smooth texture, stately design, glistening glaze, and elegant pattern.