Recognition: "Da Ming Xuande Years". Open mouth, straight belly, round feet. The mouth of the furnace is decorated with blue and white wave patterns, the inner and outer walls of the furnace are decorated with blue and white lotus patterns, and the inner bottom is decorated with blue and white production value patterns. The whole ornamental composition is dense and dense, and the lines are smoothly outlined. The fetal glaze is tightly combined, and the enamel is fine and smooth and white, matching the color of blue and white and turquoise blue.