S social and economic improvement; and their urban spatial structure has also been reconstructed. Even so; there is certainly nonetheless a certain lack of understanding from the characteristics of your spatial structure of China’s megacities. This study aimed to reveal traits on the spatial structure of Chinese megacities at distinctive scales employing jobs-housing massive information. To achieve this aim, spatial autocorrelation and also a geographically weighted regression (GWR) model had been applied to reveal static polycentricity, and community detection was applied to reveal dynamic commuting communities. The distribution of jobs in urban space and jobs ousing balance levels in commuting communities were further analyzed. Experiments have been performed in Tianjin, China. We identified that: (1) the static traits in the spatial structure of megacities presented the coexistence of polycentricity in addition to a high degree of dispersion at macro- and meso-scales; (two) the dynamic traits of your spatial structure of megacities revealed two forms of commuting communities at macro- and meso-scales and most commuting communities had a great jobs-housing balance. These findings is often referenced by urban managers and planners to formulate relevant policies for spatial distribution optimization of urban functions and transportation development at different spatial scales. Keyword phrases: megacity; spatial structure; polycentricity; commuting communities; Tianjin1. Introduction In recent decades, the agglomeration of population and industries in metropolitan D-Fructose-6-phosphate disodium salt Endogenous Metabolite places has develop into a typical phenomenon of urbanization worldwide [1], which can be particularly apparent in China [4,5]. Considering that China’s reform and opening-up, the country has achieved the quickest urbanization rate in the world. The share of Chinese folks living in urban areas has enhanced drastically from 17.9 in 1978 to 63.9 in 2020. As outlined by China’s criteria for urban scale, cities with greater than five million residents in an urban region are classified as megacities. At present, you can find twenty-one megacities in China, seven of which have greater than ten million residents within their urban region. Megacities, too as dense urban regions with megacities because the core, have undoubtedly become the core spatial carriers major China’s social and economic improvement. With urban expansion, the spatial structure of megacities has also been reconstructed [6], top to changes inside the distribution of distinctive kinds of urban land use, and alterations in travel patterns of residents. These alterations have led to a series of issues in the sustainable improvement of megacities, including jobs ousing segregation [7], excess commuting [8], air pollution [9], plus a decline within the quality of life [10]. Consequently, an investigation of thePublisher’s Note: MDPI stays neutral with regard to jurisdictional Charybdotoxin site claims in published maps and institutional affiliations.Copyright: 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access post distributed beneath the terms and circumstances with the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ four.0/).Land 2021, 10, 1144. https://doi.org/10.3390/landhttps://www.mdpi.com/journal/landLand 2021, ten,2 ofcharacteristics of your spatial structure of megacities would aid to understand the current spatial development of Chinese cities, and offer corresponding urban transport and land use policies. By taking a look at the case of Tianjin, this paper aimed to rev.