Sales promoters talk to visitors at a housing fair in Nanjing, China. With real estate prices through the roof, 70 to 80 percent of potential buyers are unable to purchase housing some of China's major cities. (Associated Press)

Sales promoters talk to visitors at a housing fair in Nanjing, China. With real estate prices through the roof, 70 to 80 percent of potential buyers are unable to purchase housing some of China's major cities. (Associated Press)