1929年10月，资本主义世界爆发了空前的经济危机，帝国主义国家把加紧向殖民地半殖民地控制掠夺作为摆脱危机的手段，中国也就成了他们控制掠夺的重要对象。帝国主义国家对华商品倾销更加猛烈，致使中国的进口货物剧增，出口货值大减，尤其是“九一八”事变后这种情况更加严重 In October 1929, an unprecedented economic crisis broke out in the capitalist world. As imperialist countries stepped up their control of the colonial and semi-colonial areas as a means of getting out of the crisis, China became an important target of their control over the plunder. The dumping by the imperialist countries of Chinese goods is even more violent, resulting in a sharp increase in China’s imports and a sharp drop in the value of exports, especially after the “September 18” Incident