This study adds meaning to the rapidly developing Chinese ethnic Korean companies’ competitiveness by establishing a network with Korea , revealing the key factors for Chinese ethnic Korean companies to establish a network with Korea through empirical research, and furthermore , The Hansang Congress wants to figure out how ethnic Korean entrepreneurs’ unity in the national network affects their management performance. Looking at results of this study, fist of all, the formation of a network with Korean-Chines entrepreneurs has a positive impact on the management performance of Korean-Chinese entrepreneurs. In addition, it was found that Chinese- Korean entrepreneurs used the ‘national Identity’ of Chinese people to secure their competitiveness through social network benefits with Chinese society in the relationship between Korean and China. Finally, it can be seen that the formation of a business network has a direct impact on management performance rather than strengthening the cohesion of ethnic networks through the Hansang competition of ethnic Korean entrepreneurs. These findings are more realistic and concrete transnational community network phenomena than the conventional abstract concept of Korean diaspora, which is meaningful in explaining through empirical research. In particular, in the business environment of each rapidly changing article, Korean companies want to present guidelines for strategies to secure corporate competitiveness through cooperation between Chinese-Korean companies and their counterparts in theworld.