Blue and white porcelain, also known as blue and white porcelain on white ground, referred to as blue and white, is a brilliant treasure of Chinese porcelain, ranking among the prestige of underglaze colored porcelain. The nose is made of cobalt ore containing cobalt oxide as ink, splashing ink on the ceramic body, drawing a variety of ornaments. It is then covered with a layer of transparent jade glaze, which has undergone the baptism of high-temperature flames and finally becomes a blue treasure. The blue color of the cobalt after firing, Deep and bright, like the stars in the night sky, shining with a charming light.