Why did the development of pottery craft design slow down after the establishment of the Persian Empire?

After the establishment of the Persian Empire, the pace of development of pottery craftsmanship and design slowed down. This was because the focus of pottery craftsmen's work gradually shifted to architectural decoration, and the increasingly prosperous production of metal utensils made society more concerned about Japan. The need for pottery was reduced. The main achievement of pottery design during this period is the development of green lead-glazed pottery. From the Parthian dynasty to the Sasanian dynasty, various green-glazed pottery pots, cups, and pots became increasingly popular. The key parts of the decorative design of this type of pottery are the neck and shoulders. They are often decorated with ears or handles, or patterns that are pasted, kneaded, carved, or embossed. The style often shows traces of imitating metal vessels, and sometimes Certain techniques in design and production can still be vaguely influenced by Roman pottery and metalware.