It turns out that the rich resource treasure in Northeast China has become the object of plunder by Japanese monopoly capitalists: Anshan supplies iron, Fushun supplies coal, and obtains wood from forests in Jilin and Heilongjiang. In this way, it plunders a large number of important materials from Manchuria every year. In addition, Japan has invested heavily in foreign investment, and more than 70% of foreign investment in Northeast China is Japanese. By the end of 193 1, Japan's total investment in northeast China reached 175 billion yen, making northeast China an important place for Japanese imperialist capital export.