Ju Ware was ranked first in five famous kilns in Song Dynasty. The kiln is located in Linju and Baofeng, Henan area. Ju Ware was famous for celadon, its color and luster are green, and glaze was thick and sparkling. Ju Ware change to azure during burning, it relies mainly on a small amount of iron in glaze. The unconscious defects (due to the dilatability of porcelain body and glaze are different) became a conscious decoration in the burning process.