1. White porcelain in Yao Xing in the Tang Dynasty can be divided into fine porcelain and ordinary porcelain. The fine carcass is light and thin, with regular shape, bright and moist glaze color, white and blue glaze colors, strong sense of glass and translucent glaze color. The embryo is thin and white, beautifully decorated, but the number is small. Yao Xing's white porcelain is yellow and white, and some use white makeup soil to increase the whiteness of porcelain, and the shape is more casual.

2. In the early Tang Dynasty, the matrix of Yue kiln porcelain was light gray, dense and meticulous, with thin glaze juice, even and meticulous, moist as jade, turquoise and some yellowish. There is also the style of the Sui Dynasty. The vertical device is high and thin, the bowl is wide and shallow, the mouth and abdomen are vertical, the lower abdomen is obliquely folded and restrained, and the bottom is flat. In the middle and late Tang Dynasty, the matrix of Yue kiln porcelain was dense, grayish white, and the glaze color was even and smooth, including eel yellow, light blue and turquoise, and glazed. At this time, the bowls and plates are more open, the bottom is wide and short, like jade, and the middle ring is glazed in the concave. There are three, five or seven square or strip Zhi Ding marks on the feet. Lotus leaf-shaped or flowered plates and bowls appeared in the late Tang Dynasty. Porcelain decoration is mainly light elements, but there are also scratches, carvings, overlapping carvings and hollowing out. Flowers are the most common decorative patterns, such as flowers and birds, landscapes and figures.