Tourists visit Guchengwan artificial wetland in the Litong District of Wuzhong City, northwest China's Ningxia Hui Autonomous Region, Aug. 10, 2024.

Wuzhong has a piece of artificial wetland called Guchengwan that plays a vital role in the Yellow River's ecological environment. Part of a wastewater disposal system, the wetland follows the natural working way of waste and pollution disposal in natural wetlands.

With an investment of 98 million yuan (about 13.7 million U.S. dollars), the wetland supports a waste disposal facility that further purifies already-treated water, ensuring high-quality soil water in the region. (Xinhua/Yang Zhisen)