An aerial photo shows over 200 young Chinese and South Korean volunteers planting trees in the Kubuqi desert in Dalad Banner, Ordos, a city in North China's Inner Mongolia autonomous region, on March 31. Since 2006, the China Youth Center for International Exchange and the South Korean-China Cultural and Youth Association have arranged for young volunteers from China and South Korea to plant trees in the Kubuqi Desert to slow desertification and sand fixation. Over 8.5 million trees have already been planted and over 30,000 mu (2,000 hectares) of land has been afforested. [Photo/Xinhua]