Abstract: This paper introduces the background and outlines of the theory of dualnuclei structure model and explains the connotation and three important preconditions for establishing this model. In the dualnuclei structure model, the strength of economy in central cities of a region must be most prosperous in this region, and the central city should have the same economic strength and scale as the seaport，and the two cities （the central city and the seaport）should have close social and economic relationship within the region. Recently, the model of dualnuclei structure of Wuhan and Shanghai was put forward and this paper deals with a conclusion by investigating in Shanghai that it is impossible for the two cities,Wuhan and Shanghai,to form dualnuclei structure at present according to the three preconditions of the model of dualnuclei structure. There are three reasons. Firstly, as a central city, Wuhan has little economic influence on Shanghai. Secondly, there is a definite difference in economic strength and city's scale between Wuhan and Shanghai. And the most important reason is that Wuhan has not built up close social and economical relationship with Shanghai and there is no functional supplement between The authors point out that it is necessary that the economical relationship of Wuhan and Shanghai should be strengthened, and we have to examing further in this field in order to form the model of dualnuclei structure of Wuhan and Shanghai. It is suggested that the economical cooperation of the two cities can be urged by technology diffusion. Then Wuhan and Shanghai can get further development and the dualnuclei structure model of the two cities can be formed and developed gradually by regional cooperation.

Key words: dual-nuclei structure, Wuhan, Shanghai, technology diffusion