China’s leadership, under Xi Jinping, has initiated a significant strategic shift toward a "fortress economy" designed to bolster national self-sufficiency and resilience against external shocks, and ultimately allow the nation to withstand “extreme situations” including protracted armed conflict. This paper provides a comprehensive analysis of the evolution of China’s fortress economy policy, tracing its roots from early warnings about international instability to its formalization in China’s 14^th Five-Year Plan and subsequent policy actions. By examining official speeches, policy documents, and strategic initiatives, the paper explains how the Chinese Communist Party (CCP) is operationalizing this strategy through key domains such as food security, energy independence, and critical supply-chain resilience. The analysis highlights the CCP’s perception of an increasingly hostile international environment, prompting a paradigm shift that prioritizes national security and economic self-reliance. This research contributes to understanding China’s strategic intentions and provides a foundation for further exploration of the implications of China’s fortress economy on global economic and geopolitical dynamics.