Based on the concept of the world city network(WCN), this paper analyzes city network that is based on producer service industries in China's mainland at three levels. The corresponding findings include: firstly, at the sub-node level, the location decision-making of producer service industries is no longer merely dependent on linear expansion along the hinterland to establish spatial monopoly, but on a network layout mode based on setting up branch offices in core cities to maximize the profits; secondly, at the city node level, Beijing and Shanghai have become the two major cities for the agglomeration of producer service industries. The coastal city clusters are the principal areas for the concentration of producer service industries, while the majority of other cities are in the peripheral area of the network where there are comparatively low connectivities; thirdly, at the city network level, the primacy effect of Beijing and Shanghai in the city network is extremely signifi cant and the linkage among core cities, namely, Beijing, Shanghai, Guangzhou, and Shenzhen, in the three major city clusters forms the core network of the producer service industries in China's mainland.
