Baidu Encyclopedia has a complete picture of natural human geography in Northeast China.

Secondly, sort out these natural and human geographical conditions and pay attention to the causal relationship during the period, such as the development of mixed coniferous and broad-leaved forests, deciduous broad-leaved forests and black soil. Under the condition of northeast temperate monsoon climate; With such natural geographical conditions, there are human geographical conditions such as agriculture and industry, and so on.