When does the chassis say cloisonne in China?

In spring and autumn. Cloisonne enamel written on the chassis in China is called cloisonne, which is one of the famous special handicrafts in China. This technology has existed since the Spring and Autumn Period, and it was the most exquisite and famous in Jingtai period of Ming Dynasty. Cloisonne enamel painting is a traditional handicraft, which is made of alumina and natural colored sand on wood, plastic or metal plate.