Photo taken on June 21, 2018 shows the Xi'an Expo Park located within the Chanba Ecological District in Xi'an, northwest China's Shaanxi Province. Comprehensive progress has been made since the report delivered at the 18th National Congress of the Communist Party of China (CPC) in 2012 included ecological development as a major task in the country's overall plan and proposed building a "beautiful China" as a grand goal. [Photo/Xinhua]