Six years after Yongzheng, the Qing Palace Manufacturing Office has been able to cultivate more than 20 kinds of enamel, and the color types are richer than the imported color materials, so that the production of enamel porcelain has been rapid development. The enamel porcelain of Kangxi period is mostly carmine red, egg yolk and blue, and there is a special kind of enamel painted on the purple sand of Yixing. Typical Yongzheng and Qianlong enamel porcelain is a combination of poetry, books, paintings, printing art treasures, is the ancient Chinese porcelain technology reached the peak of the product. Longevity peaches are often used to celebrate important family festivals, such as the Mid-Autumn Festival, the Spring Festival, etc., to express thoughts and wishes for the family. It symbolizes unity and beauty. The name of the peach itself has the word "longevity", which represents longevity and is a symbol of a happy birthday. The ancients believed that the peach had the effect of tonifying spleen and lung, nourishing qi and blood, enhancing physical strength, and prolonging life, so it was regarded as the fruit of longevity