The file picture taken on July 26, 2009 shows the unique hilly terrain with red rocks and cliffs of the Danxia Landform in the mountainous areas of the Zhangye Geology Park near the city of Zhangye in northwest China's Gansu Province. Danxia Landform belongs to red terrestrial clastic rock landform, which is characterized by its red cliffed scarp. [Xinhua/Fu Chunrong]