Combination photo taken in 2000 (up) and on Aug. 10, 2018 respectively shows a deserted land before (up) and after forestation by villager Ma Yunping in Duolun County of north China's Inner Mongolia Autonomous Region. Friday marks China's National Tree Planting Day. With the efforts of volunteers across the country, green lands has covered more areas of China and the eco-friendly development concept is seeded in people's heart. (Xinhua/Liu Lei)