Participants pose for photos at the venue of Eco Forum Global Guiyang 2021 in Guiyang, capital of southwest China's Guizhou Province, on July 12, 2021. China's only national-level global forum themed on ecological civilization, Eco Forum Global Guiyang 2021, opened on Monday in Guiyang. The two-day conference, centering on the country's green and low-carbon transition to build a community of life for humans and nature, will witness a range of online and offline activities. [Photo by Liu Xu/Xinhua]