如果大战彻底爆发，中国必须死保的城市里，竟还有一个三线城市？

Core Viewpoint - The article emphasizes the strategic importance of cities in China, particularly in the context of potential warfare, highlighting that both major cities and lesser-known cities like Xuzhou play crucial roles in national security and stability [1][3][20]. Economic Importance - Cities are engines of GDP growth and are central to decision-making and cultural innovation, making their protection vital for national survival [5][11]. - Xuzhou, as an industrial city, has a strong economic base that can support wartime production and logistics, thus playing a significant role in sustaining the war effort [16][18]. Strategic Military Significance - Major cities like Beijing, Shanghai, and Guangzhou are critical for political, economic, and cultural stability, while cities like Xuzhou serve as strategic military assets due to their geographical location and industrial capabilities [7][8][18]. - Xuzhou's location at the intersection of major transportation routes makes it a key logistical hub, essential for maintaining supply lines during conflict [16][20]. Historical Context - Historical battles have shown that control over cities like Xuzhou can determine the outcome of larger conflicts, underscoring its importance in both historical and contemporary military strategy [15][18]. - The article references historical examples where Xuzhou was a focal point in significant military confrontations, illustrating its long-standing strategic value [15]. Role of Lesser-Known Cities - Lesser-known cities, particularly third-tier cities like Xuzhou, are often underestimated but are crucial for regional stability and resource distribution, acting as "intermediate stations" that connect larger cities with rural areas [10][13]. - These cities foster a strong sense of community and can help maintain public morale during crises, which is essential for national cohesion [13][21].