round enamel pot yaobian in the Tang Dynasty, has been popular yaobian vitreous enamel. Mechanism of the color is due to a variety of color glaze water containing metal oxides, in the manufacturing process of porcelain enamel water from melting down and the formation of the beautiful natural flowing stain. This pot of black-based glaze, glazed on the formation of the spring water poured out like a white and blue stripe, so that both solemn and lively objects. Extremely difficult to see similar items, in general can be defined as precious relics. Original possession of the National Palace Museum in Taipei.