File photo taken on Aug. 28, 2008 shows citizens walk in a residential quarter of Yinchuan City, capital of northwest China's Ningxia Hui Autonomous Region. Yinchuan City was awarded the China Human Habitat Environment Prize 2010 by the Ministry of Housing and Urban-Rural Development on March 10, 2011. Wuxi City of east China's Jiangsu Province, Huangshan City of east China's Anhui Province, Wujiang City of east China's Jiangsu Province and Shouguang City of east China's Shandong Province also won the prize. [Wang Peng/Xinhua]