A wild duck flies over the Xiazhu Lake National Wetland Park in Deqing County, east China's Zhejiang Province, July 2, 2019. Xiazhu Lake National Wetland Park in Deqing covers an area of some 36.5 square kilometers. As main part of the park, the Xiazhu Lake features zigzag streams and rivers with big-or-small islands spreading over them. With various flora and fauna resources, the original ecological system of the lake is well preserved here. (Xinhua/Lan Hongguang)