假如大战爆发，中国必须死保的10大城市里，还有三线城市吗？

Core Viewpoint - The article emphasizes the strategic importance of seemingly less significant third-tier cities in China during times of conflict, suggesting that their roles are critical for national survival rather than just economic metrics [1][18]. Group 1: Strategic Importance of Cities - Yichang, despite being a third-tier city, is crucial due to the Three Gorges Dam, which is vital for the economic artery of the Yangtze River. Losing Yichang could lead to catastrophic flooding and economic paralysis in major cities downstream like Wuhan and Shanghai [4][6]. - Mianyang is identified as a key city for China's technological development, housing critical research institutions. Its preservation is essential for maintaining the country's strategic deterrence capabilities in the event of war [8][10]. - The Jiuquan Satellite Launch Center, located in a remote area, is indispensable for modern warfare, as it ensures the operational capability of satellite systems that are crucial for military effectiveness [12]. Group 2: Logistics and Transportation - Xuzhou is highlighted as a historical battleground and a vital transportation hub, connecting northern and southern regions of China. Its role as a logistics center is critical for military supply chains during conflicts [14][16]. - The article argues that in wartime, the ability of cities like Xuzhou to facilitate rapid troop and supply movements is a key determinant of national military effectiveness, transcending traditional economic evaluations [16]. Group 3: Overall National Defense Strategy - The cities mentioned, including Yichang, Mianyang, Jiuquan, and Xuzhou, serve as essential components of China's national defense strategy, acting as shields, swords, eyes, and arteries for the country [18][19].