This PhD project is focus on the dynamic structure and evolution of Chinese entrepreneurs' social network. We are going to use the ego-centric network approach to analyze entrepreneurs' network structure and its influence on the entrepreneurial performance. Our network data will be collected from both face-to-face interviews and mobile phones that used by the entrepreneurs. The following question will be answered: what kinds of network factors will influence entrepreneurs' performance? How the Chinese entrepreneurs' network structure will be changed during their entrepreneurial process? Will the entrepreneurs' behavior be influenced by other entrepreneurs' in their network? We assume the current entrepreneurial performance is based on entrepreneurs' network which has been evolving since they start-up business. More than 100 Chinese entrepreneurs' mobile phone continuous behavioral data will be analyzed in this research project. In order to get a better understanding of the network evolution and entrepreneurs' behavior, an action-oriented research based on Twitter will be included in this study.