七七事变前后,满铁对华北经济进行侵略和掠夺主要是通过自己的子公司——兴中公司及其他子公司或机构进行的。七七事变前,满铁对华北经济掠夺主要是以掠夺棉花、电力、黏土矿、盐业等为主。七七事变后,主要是以掠夺铁矿、煤矿、电力为主。与此同时,满铁还对大同煤矿、山东煤矿进行掠夺。 Before and after the Seventy-Seven Incident, Manchuria’s aggression and looting of the North China economy was mainly through its own subsidiary, Xingzhong Company and other subsidiaries or agencies. Before the Seventy Seven Incident, the Manchurian predatory economy in North China predominated mainly by plundering cotton, electricity, clay mines and salt industry. After the Seventy-Seven Incident, it was mainly dominated by iron ore mines, coal mines and electricity. At the same time, Manchuria also plundered Datong Coal Mine and Shandong Coal Mine.