Treasure inlay is the use of rare jewelry as lacquer inlay. There is an article "Embedding Treasure Clouds" in the Record of Shi Zhuan, "Embedding treasures include coral, amber, agate, precious stones, hawksbill, snail, ivory, rhinoceros horn and so on. Mosaic with carved lacquer boards is very expensive. " Treasure chest is famous for Zhouyi in Yangzhou, which is called "Zhou system". Qian Yong's "Luyuan Conghua" said, "The weekly system is unique in Yangzhou. At the end of the Ming Dynasty, Zhou people created this law, hence the name Zhou system. The method takes gold, silver, precious stones, pearls, corals, jasper, jadeite, crystal, agate, tortoise shell, chequ, green gold, green pine, mother-of-pearl, ivory, beeswax and agarwood as materials, and carves them into landscapes, figures, trees, terraces, flowers, feathers and feathers. Large screen, table, chair, window sash, bookshelf; Small pen bed, tea set, inkstone box, book box. Far away, indescribable, really unprecedented.