Introduction to ceramic fragments: Changsha Tongguan Kiln arose in the mid-to-late 8th century AD and declined during the Five Dynasties period in the 10th century AD. It has a history of more than 1,000 years. In an underground window in the hall, the preservation status of ceramic fragments at the old kiln entrance of Changsha kiln is displayed. Many ceramic fragments have been stacked in the ground for thousands of years.