Photo taken on April 18, 2019 shows the Inner Mongolia Garden of the 2019 Beijing International Horticultural Exhibition (Expo 2019 Beijing) in Yanqing District of Beijing, capital of China. Inner Mongolia Autonomous Region lies at the forefront of China's fight against desertification. The region's afforestation efforts will consolidate its role as an important ecological barrier protecting northern China. Afforestation of Kubuqi Desert has reached 3,200 square kilometres in recent years which changed the environment tremendously. In 2014, The United Nations Environment Program (UNEP) announced that Kubuqi Desert is an ecological economy demonstration zone. (Xinhua/Li He)