1937年抗战爆发后,初期由于日军强大,很快占领了沿海各地,迫使中国政府及人民退居西部,继续抗战。 由于港口被日军占领及封锁,为了国际贸易及得到国际援助,必须打开国际通路。当时主要有3条: 第一条是陆路,由甘肃、新疆通往苏联。抗战初期苏联空军的援助等即由此路而来,但路途遥 After the outbreak of the war of resistance in 1937, due to the strength of the Japanese army in its early days, it occupied the coastal areas quickly and forced the Chinese government and people to withdraw from the west and continue the war of resistance. Due to the seizure and blockade of the port by Japanese troops, international channels must be opened for international trade and international assistance. At that time there were three main: the first is land, from Gansu, Xinjiang, leading to the Soviet Union. From the very beginning of the war, the assistance of the Soviet air force came from this route, but the road was far away