抗日战争爆发后,国民党政府撤至重庆。当时被称为后方的四川、云南、甘肃等西南、西北各省,工业基础极为薄弱,战前一般都依靠国外或东南沿海各省供应工业用品。抗战期间,日寇为迫使国民党政府投降,加紧对后方的经济封锁,致使运入后方的工业品大幅度减少。 After the Anti-Japanese War broke out, the Kuomintang government retreated to Chongqing. Back then, the industrial bases in southwestern and northwestern provinces such as Sichuan, Yunnan and Gansu provinces were extremely weak. Before the war, the supply of industrial products was generally dependent on foreign or southeastern coastal provinces. During the war of resistance against Japan, the Japanese invaders forced the Kuomintang government to surrender and stepped up the economic blockade on the rear, resulting in a drastic reduction in the number of industrial products brought into the rear.