Research on the mix-incoming housing in the transformation period of China 并列题名：Research on the mix-incoming housing in the transformation period of China Study on economic performance and environment in the transformation period of China 并列题名：Study on economic performance and environment in the transformation period of China Research on the risks of library transformation in China Social risks of democratization during the transformation period in China 并列题名：Social risks of democratization during the transformation period in China