"the shape of porcelain in the Kangxi period was heavy and clumsy, and the shapes of new inventions were various. Porcelain is hard and fine, meticulous as jade, regular porcelain repair, there is a general sense of weight. The glaze is smooth and delicate, the tire glaze combines closely, and the glaze has evolved from the early blue-white to the middle pink-white and paste-white. From the middle of Kangxi to Yongzheng period, it changed into hard bright blue glaze, blue and white used Chinese pearl bright material, blue and blue tone was mainly green and blue, all of which had the characteristics of deep tone and close to fetal bones. Colorful and other colors, the early color is thick and gorgeous, the middle is faded, and the late tone is soft. In the early days, the mouth of the utensils was often coated with sauce yellow glaze, and the mouth was generally covered with a layer of powdery white glaze, giving people the feeling of thickening and protruding along the mouth. The colorful colors are made up of five colors: red, yellow, blue, green and purple. The colorful colors of the Ming Dynasty are composed of red, yellow, green and purple four kinds of over-glaze colors and under-glaze blue and white. The blue color on the glaze is used instead of the blue and white under the glaze. It is also composed of red, yellow, green, blue and black. During the period of Kangxi, some of the colorful colors added gold colors to make the picture magnificent. "