Photo taken on Aug. 22, 2020 shows a helium balloon floating in the sky in the Xixi National Wetland Park in Hangzhou, east China's Zhejiang Province. Xixi National Wetland Park, located on the outskirts of Hangzhou, is the first national wetland park in China. The wetland park helps to restore the local ecology and also serves as an eco-education, research and tourism base. (Xinhua/Huang Zongzhi)