During Jingtai period, in addition to blue land, there were many kinds of glazes, such as sapphire, sky blue, emerald, ochre, bright yellow, red, light green, dark green, suet white, grape purple and so on 10. Yang Wen's four-character three-legged furnace in this period collected in the Palace Museum is emerald green, amethyst grapes, dark green leaves, cloisonne twisted and polished neatly, reaching a mature stage, which is the representative of cloisonne boutique.