The company founded in 1917 is the largest coal miner in northeast China , an employer in Heilongjiang with 248,000 employees as of March 2014 . Address : No. 235 Mingjiang Road Nangang District Harbin , 150090 , China It was involved in a mining accident that occurred on November 21 , 2009 near Hegang in Heilongjiang province , northeastern China . This accident was referred to as the 2009 Heilongjiang mine explosion
2009 Heilongjiang mine explosion
2009 Heilongjiang mine explosion
Heilongjiang Longmay Mining Holding Group Co., Ltd.