Building a Northeast Asia Free Trade Area and East Asia Economic Union has been constrained by the domestic economic infrastructure and regional politics of China, Japan, and Korea. It has been widely viewed as an unreachable goal. Despite its difficulties, China has been aggressively promoting impossible tasks. This paper utilizes the opportunity and willingness constructs to analyze entities, the environment, and the relationship between each entity and the environment to explain China's decision-making path in the promotion of the Northeast Asia Free Trade Area. In the field of international politics, the decision-making path of an entity is influenced by the constructs of opportunity and willingness, and these two constructs rotate the roles of the dependent variable and independent variable interchangeably depending on the fluctuations in the entity's environment. In the case of the Northeast Asia Free Trade Area, China has assumed a ”willingness” to focus on a ”process” instead of reaching its ”goal” on the learning trail of regionalization and globalization.