On August 24, the petals of many cannas expanded in the Xiaoting Ecological Wetland Park. The seven surface flow wetlands (SFW) are filled with water lilies, lotuses and water milfoils. Together with the underwater soil, they would purify the wastewater of the pond 7 times. It is learned that the ecological park is constructed under a project using the ecological wetland for wastewater recycling. Covering an area of 200 acres, and with a total investment of 60 million yuan, the park can handle 20,000 tons of wastewater daily.（Reporter Yue Li; correspondent & Photographer Tang Shuitang）