A drip irrigation equipment is used to water a windbreak forest in Golmud, northwest China's Qinghai Province, May 25, 2012. About 90 percent of the lands of Golmud City, or 3.7 million hectares, are deserts. Local people have planted more than 6,000 hectares of trees since 1954 to combat desertification and have gained certain achievements. [Xinhua]