All rights reservedXiu, YangYuwei, TengTianzan, Lu2024-01-102024-01-102015978-80-01-05782-7https://hdl.handle.net/20.500.14235/1160Book of proceedings: Annual AESOP Congress, Definite Space – Fuzzy Responsibility, Prague, 13-16th July, 2015Studies show that, after the urbanization ratio in the Yangtze River Delta exceeded 50% in 2000, the urban construction space in the region continues to expand rapidly, which has brought about such problems as land use and environment constraining the urbanization process. To address the many problems seen in the urbanization process, and stand together against the competition from other city clusters in the world, the Yangtze River Delta has been enhancing the efforts in collaborative development after its urbanization ratio exceeded 50%. To maintain the environmental survival bottom-line and obtain the benefits of joint efforts against the external competition, though it has been lacking in the cultural environment of collaboration and in the strong institutional support, the Yangtze River Delta, since Year 2000, has made considerable practice in the collaborations of environment harnessing, building of infrastructures, land use and development, and knowledge innovation in the region. Studies show that, after the urbanization ratio exceeded 50% in the Yangtze River Delta, the collaborative development among cities, in terms of geographic territory, has been shifting from the collaborative development in the multiple points to that in the belt of neighboring regions and in the network structure with layers. At the same time, it is also developing from the collaborative development of physical space to that of virtual space.EnglishopenAccessconferenceObject1715-1727