(2) The terrain in Northeast China is dominated by plains, hills and mountains, which are surrounded by water. Woye Li Qian is a vivid portrayal of the terrain in the northeast of China, and its surface structure is roughly semicircular with three zones: the lowlands of Heilongjiang, Wusuli, Tumen and Yalu rivers are in the periphery, the mountains and hills are in the middle, and the vast plains are in the interior; The three northeastern provinces are Heilongjiang Province (the capital city is Harbin), Jilin Province (the capital city is Changchun) and Liaoning Province (the capital city is Shenyang).
(3) Northeast China has a temperate monsoon climate, and it is hot and rainy in summer, with the same period of rain and heat, and rice can also be planted under the influence of the climate characteristics of rain and heat;
(4) The Great Northern Wilderness is located in the east of Heilongjiang Province, adjacent to Russia. Among them, Sanjiang Plain is listed in the international wetland protection list because of its dense rivers, swamps and trees. After decades of development, it has become an important grain and soybean production base in China. In 2000, our government decided to stop reclaiming the Great Northern Wilderness.
(5) Northeast China is rich in mineral resources, with convenient land and water transportation and developed heavy industry, among which the industrial base in central and southern Liaoning is the largest heavy industry base in China.
So the answer is: (1) Daxinganling; Changbai Mountain; Northeast-southwest; (2) Surrounded by mountains and waters, fertile fields are thousands of miles away;
(3) It is hot and rainy in summer, with rain and heat in the same period; (4) protecting "wetlands" and improving the ecological environment; (5) heavy industry; Rich in mineral resources and convenient land and water transportation.