抗日战争初期,中国政府和苏联签定了中苏互不侵犯条约。随着西北国际交通线的建立,苏联政府援助中国抗战的飞机、大炮和枪支弹药源源不断地运往中国。兰州是西北国际交通线上的战略支点和中国政府接受苏联援华物资的重要基地。苏联政府还派出援 In the early days of the Anti-Japanese War, the Chinese government signed the Sino-Soviet non-aggression treaty with the Soviet Union. With the establishment of the Northwest International Traffic Line, the Soviet government provided assistance to China’s anti-Japanese aircraft, artillery and guns and ammunition continuously and steadily to China. Lanzhou is a strategic pivot on the northwest international traffic line and an important base for the Chinese government to accept Soviet aid to China. The Soviet government also sent reinforcements