It was formed in the Republic of China and developed in Japan. After the founding of New China, a lot of manpower, material resources and financial resources were invested to build the old industrial base in Northeast China. The mineral resources here are very rich, especially iron and coal, and there are relatively few wars here, which are basically not seriously damaged. Perfect infrastructure, convenient for economic development, located in the plain, convenient transportation, close to the sea, convenient transportation, rich human resources and relatively high education level. All these make Northeast China an important heavy industry base.