The Affection on Urban Network Structure after High-Speed Railway in Operation in Guangxi

Chinese urban is affected by the rapidly construction of high-speed railway, especially about urban spatial network structure. We used network density, centrality and cohesive subgroups based on social network analysis to study the affection of Guangxi urban network structure, highspeed railway in operation in 2013/2017. Result shows: Relation, valid connection increases after high-speed railway in operation of Guangxi urban network and urban overall relation enhances. The centrality degree increases. The relation enhances between city and distance of spatial relation shortens significantly between city. Nanning, Liuzhou, Guilin and Yulin in a strong and central position, affect other cities, and affected by other cities greatly. Four substructures forms, which have great internal relation, and interaction greatly between 1, 3 and 4 cohesive subgroups.