From the standpoint of EU enlarged countries, this empirical study investigates the trade relationship with East Asia via an outlier approach in export and import time series. The results show the exports in trial-and-error progress compared to the imports in a developed adjustment. The outlier patterns clearly demonstrate the divergent trade relationship between the sample countries. This study makes a contribution to the outlier approach in the context of international trade. It concludes that the deeper incorporation of EU enlarged countries into East Asia can lead to significant involvement in the global supply chain and highlight the sustainability of economic growth.