七台河和双鸭山是黑龙江省4大煤城中的两座。七台河是国家重要的煤炭生产基地,也是东北地区最大的主焦煤生产基地和黑龙江省最大的无烟煤生产基地;双鸭山也是典型的煤炭资源型城市,煤炭采掘业占全市工业比重的1/3。双鸭山矿业集团是国家最早建设的煤炭生产基地之一。经过40多年的开发,这两座城市已 Qitaihe and Shuangyashan are two of the four largest coal cities in Heilongjiang Province. Qitaihe is an important coal production base in the country. It is also the largest major coking coal production base in Northeast China and the largest anthracite production base in Heilongjiang Province. Shuangyashan is also a typical coal resource-based city, and coal mining industry accounts for 1/3 of the city’s industrial share. Shuangyashan Mining Group is one of the country’s earliest established coal production bases. After more than 40 years of development, these two cities have