The four national-owned bureaus of Jixi,Hegang, Shuangyashan, Qitaihe are all super-large scale enterprises of our national coal industry, which are all of typical coal-resource type cities.

• 我省的鸡西、鹤岗、双鸭山、七台河四个国有矿务局都是年产超千万吨的全国煤炭工业特大型企业，四城市均属典型的煤炭资源型城市。