Expert involvement has received increasing academic attention, and expert typology, organizational types and knowledge utilization have been well documented and well theorized. However, the literature on expert involvement is remarkably silent on how to understand the internal structure of expert groups and the influence they bring to bear. In this study, we seek to bridge this gap by theorizing and empirically demonstrating the internal discrepancy in expert network. We do so through an in-depth qualitative analysis of data from an empirical study on urban planning decision-making in China. Building on existing literature, participant observation and interview data, the study elaborates an expert network model that analyses how government choices, organizational characteristics, and capital in network resources shape expert influence. The empirical analysis indicates that the role an expert receives in policy making is a consequence of different expert networks. Based on this, we developed the concept of “resources empowerment expert network” to understand the logic of resource flow in network and discuss how this concept can contribute to the broader literature on expert involvement.