中国人民解放战争时期,辽沈、淮海、平津三大战役后,人民解放军向华中、华南进军,横扫千军、势如破竹。蒋介石费尽九牛二虎之力,精心构筑的长江防线,在人民解放军打击下,彻底崩溃。但是,蒋介石仍不甘心在大陆的失败,苦心经营“大西南防线”,企图保住云南,作为在大陆的“党国复兴基地”。然而,他在 After the Chinese People’s Liberation War, the two major campaigns of Liaoshen, Huaihai and Pingjin, the People’s Liberation Army marched toward central and southern China, sweeping the thousand armies with irresistible force. Chiang Kai-shek has exhausted all his might to make every effort and the well-constructed Yangtze Defense Line has completely collapsed under the attack by the People’s Liberation Army. However, Chiang Kai-shek is still not willing to fail in mainland China and has painstakingly managed the “Great Southwest Defensive Line,” attempting to keep Yunnan as its “base for the party-state restoration” in the Mainland. However, he is