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As a mega-system, city functions with dynamic participants interacting simultaneously (Barthelemy et al., 2013; Batty, 2007). It then brings up a fundamental question on how city evolves into the place where we live every fc{0"Uekgpvkuvu"Ýpf"pqp/ecwucnkv{"kp"u{uvgocvke" evolvement, which gives a clue to understand the complex system and its evolutive principle, that is, in most circumstances, outside pressures on the system cannot determine its inner behaviors, but stimulate the system to selforganization. Clearly, this pressure-response pattern can refer to top-down planning as the outer force stimulating self-organizational Abstract. The dualism of top-down planning versus self-organization has dominated the paradigm on the evolvement of urban morphology. However, the coexistence of the both can be observed in different scale phenomena, such as the locality of city, states, or even global contexts. In the network of the global economy, urban places as spatial effects of globalization result from negotiations between international capitals and local powers. At the same time, the transitional city form also responds to changing regulations under the state socio-economic regime. Due to economic competitiveness, the entrepreneurial vwtp"kp"vjg"owpkekrcn"iqxgtpcpeg"tgÞgevu"vjg"tqng"ujkhv"qh"nqecn"cwvjqtkvkgu"htqo" passive regulation operators to active agents for investment attractiveness and jkij"Ýuecn" kpeqogu0"Vjqug"ejcpigu"jcxg"rctvkewnct" korcevu"qp"ekv{"rncppkpi" while self-organization emerges in urban places. Thus, we study the socioeconomic strata within contemporary urban Chinas territories to discover dynamics of urban morphology, interacting factors and quantitative signatures hqt" ugnh/qticpk¦cvkqp" crctv" htqo" vqr/fqyp" kpvgtxgpvkqpu" cpf" Ýpcnn{" vq" tgxgcn" the place-shaping mechanism. In the well-reserved Houzaimen neighborhood of Nanjing, the extremely close system-danwei and dayuan has gradually changed into the new community-xiaoqu. By site surveys and measurement approaches, the recognized pattern in residential ownerships, the allocation of commercial activities, accessibility and connectivity of residential areas, and fractal distributions in urban fabrics can help to compare self-organizing xiaoqu with planned dayuan for systematic openness and complexity towards sustainability. Meanwhile, dimension spectrum of the fractal structure reveals the mechanism of city evolvement. The result shows the open system fostering self-organization has higher value of fractal dimensions than the segregated one, while it may not necessarily be highly connected small-world networks. In addition, the identical fractal structure discovered in dayuan proves selforganization can emerge from the planned system.

Self-organization in planned Danwei and Dayuan: A case study of the transitional Houzaimen neighborhood of Nanjing in urban China