Research on integrated development of central plains urban agglomeration Research on coordinated development of urban agglomeration Research on the development of urban agglomeration Research on the synergistic development of Hohhot-Baotou-Ordos urban agglomeration Research on the interactive development of new urbanization and industrial agglomeration Research on transition and development in Yangtze River Delta urban agglomeration 并列题名：Research on the synergistic development of Hohhot-Baotou-Ordos urban agglomeration 并列题名：Research on the interactive development of new urbanization and industrial agglomeration Study on the new development trend of China's urban agglomerations 并列题名：Research on transition and development in Yangtze River Delta urban agglomeration