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. 2020 Oct 26;10:18241. doi: 10.1038/s41598-020-75318-9

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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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The migration network based on Baidu Migration Matrix. The nodes represent 361 Chinese cities whose migration flows are available to us, and the length and thickness of the edges indicate the travel frequency between the corresponding pair of cities. The node size is proportional to the numbers of transit passengers at the corresponding city. The network does not include Hong Kong, Macau and Taiwan, as the Baidu Migration Matrix does not include them. The graph is produced in Gephi v0.9.2, available at https://gephi.org/.