Date: Eastern Zhou Dynasty (770-221 BC)
Provenance: Unearthed from the ruins of the capital city of the Zheng and Han states, Fengzhuang village, Xinzheng, Henan province
Measurements: Diameter: 16.8-20 cm

The city served as the capital of both Zheng and Han states during the Spring and Autumn (770-476 BC) and Warring States periods (475-221 BC), lasting for over 500 years. It was divided into the east and west cities. The west city, serving as the inner city, primarily contained palace areas, while the east city, known as the outer city, was densely distributed with handicraft workshops. This drain pipe was discovered at the site of the pottery workshop, and was regarded as part of the workshop's artifacts.

Archaeological findings reveal that the pottery workshops in the ancient city had a comprehensive drainage system, mainly composed of a group of drainage pipes designed to drain the workshop's production water. The unearthed pipes from the Xinzheng pottery workshop consisted of large main pipes connected to multiple branch pipes. The main pipes included pentagonal and circular pipes as well as rectangular patterned bricks, and were categorized into light and dark varieties. This system represents the most sophisticated and intricate pipework found in the city ruins of Zheng and Han states to date.