Photo taken on July. 26, 2012 shows the tall buildings of Yuzhong peninsula in Chongqing municipality. According to The Urban Blue Book: China City Development Report No. 5, released by the Chinese Academy of Social Sciences on Aug. 14, the number of urbanites has surpassed the number of rural residents in China, with the urbanization rate reaching 51.27 percent, a significant change in the country's social structure which ushers in an era of "city-based society".[Photo/Xinhua]