Abstract Summary
Since modern times, Russia and Japan fought for the rights of railways in northeastern China. Therefore, a large number of colonial towns of railway-affiliated land were built at that time. At the same time, the northeast authorities of China built commercial lands next to the colonial town to resist the invasion of the foreign powers, thus the collage city emerged. This research takes Changchun City, China as an example as its spatial and historical importance. Changchun is located in northeastern China, and it is the intersection site of three railways, including the China Eastern Railway controlled by Russia, the South Manchuria Railway controlled by Japan and the Ji Chang Railway controlled by China, which has the most representative phenomenon of fragmentation and collage. There are multiple urban forms in Changchun including the old city region, General Settlement region（trading ports）, railway subsidiaries (special railway) and leased territory. The degree of colonization and state ownership of each form is different, the planning concept and the block scale are also diverse. As a result, different urban texture has been formed, which is interpreted as Street Gene. Through the investigation of Street Gene, this paper reveals the differences of planning methods and scales used in colonial cities.
