Visitors view works during the exhibition "Hidden Land--Shangjuanzu Villagers and Artists' Image Experiment" at the Today Art Museum in Beijing, capital of China, April 7, 2013. Over 2,600 photography works from some 80 photographers and 29 Shangjuanzu villagers were displayed at the exhibition that kicked off on Sunday. Shangjuanzu is a group of families of Yangzhuang Village, belonging to Xiji County of northwest China's Ningxia Hui Autonomous Region. The exhibition is the result of an experimental visual art program. [Xinhua/Li Mingfang]