West1211'e, east 135 05'E, south to 43 26' n, north to 53 33' n, east-west longitude 14. The east-west span 14 longitude has three wet areas.
It covers an area of 473,000 square kilometers (including Jiagedaqi District and Songling District). The north and east are adjacent to Russia, and the border line is 3045 kilometers long, which is an important channel for the Asia-Pacific region to lead to the Russian Far East and the European continent. The west and south are adjacent to Inner Mongolia and Jilin Province respectively, and the east is close to the Sea of Japan.
Extended data:
I. Topography
The landform of Heilongjiang Province is characterized by "five mountains, one water, one grass and three fields". Generally speaking, the terrain is high in northwest, north and southeast, and low in northeast and southwest. It is mainly composed of mountains, platforms, plains and water surfaces. The northwest is Daxinganling in the northeast-southwest direction, the north is Xiaoxing 'anling in the northwest-southeast direction, and the southeast is Zhangguangcailing, Laoyeling and Wanda Mountain in the northeast-southwest direction.
The piedmont and eastern mountains of Xing 'an Mountains are platforms, the northeast is Sanjiang Plain (including Xingkai Lake Plain), and the west is Songnen Plain. The elevation of mountainous areas in Heilongjiang Province is mostly between 300- 1000m, accounting for about 58% of the total area of the province.
The elevation of the platform is between 200 and 350 meters, accounting for 14% of the total area of the province. The plain is between 50 and 200 meters above sea level, accounting for about 28% of the total area of the province. ?
Second, the climate characteristics
Heilongjiang province belongs to cold temperate zone and temperate continental monsoon climate. From south to north, the whole province can be divided into middle temperate zone and cold temperate zone according to the temperature index. From east to west, it can be divided into humid area, semi-humid area and semi-arid area according to dryness index.
The main features of the climate in the whole province are low temperature and drought in spring, warm and rainy in summer, easy waterlogging and early frost in autumn, long cold winter, short frost-free period and great regional differences in climate. The precipitation in Heilongjiang province shows obvious monsoon characteristics. Affected by the southeast monsoon in summer, there is abundant precipitation, and in winter it is dry and less rainy under the control of the dry and cold northwest wind. ?
Baidu encyclopedia-Heilongjiang