Testing of Hypothesis 1.

Maintaining the stability of foreign trade in an uncertain environment is crucial to building a new development pattern. By combing through the existing literature, this paper analyzes the impact of economic policy uncertainty on enterprise export recovery from the perspective of market integration. Firstly, theoretical analysis shows that economic policy uncertainty is expected to attenuate enterprise export recovery levels by amplifying export transaction costs. Secondly, the escalation in market integration is anticipated to mitigate the attenuation above effect through the mechanism of "enhanced production efficiency", while simultaneously amplifying it through the mechanism of "intensified market competition". Based on the empirical test of China’s micro-level data, it is found that the rise of market integration generally alleviates the weakening effect of economic policy uncertainty on enterprise export resilience, and this mitigation effect is more obvious for high-efficiency enterprises; The test results of further mechanism analysis and heterogeneity analysis are also consistent with the logic of theoretical analysis.