Photo show the beautiful scenery of Zhangye National Wetland Park, Northwest China's Gansu province. The wetland is composed of lakes, moors and reed beds across 33,000 hectares in its core area. It's the largest oasis in China's Gobi desert and an important stopover site for dozens of species of migratory birds from Siberia to Central and South Asia. [China.org.cn/Photo byWang Jiang]