The company is a joint stock limited company approved by Liaoning Provincial Economic system Reform Commission "Liaoti Gaifa  No. 68" on December 31, 1992. at the time of its establishment, the enterprise name was "Dalian Northeast Thermal Power Development Co., Ltd.". On March 18, 1997, the company was listed on the Shanghai Stock Exchange. The company is a nationwide listed power generation company controlled by the State Energy Group, mainly engaged in power, thermal production and sales, the industry involves thermal power, hydropower, wind power, photovoltaic power and other fields. The company's main products and services are power products, thermal products, chemical products, fuel and other products. Corporate honors: national civilized unit, panoramic investor relations gold award, top 50 board of supervisors of listed companies, advanced units of China Guodian Group in 2016, global top 500 new energy enterprises, etc. By the end of June 2021, the company had a holding installed capacity of 82.3979 million kilowatts, and the installed scale and equipment level were in a leading position among listed electric power enterprises, including 56 units of more than 600000 kilowatts, accounting for 69.13% of the installed capacity of thermal power, and 18 units of 1 million kilowatts and above, accounting for 32.85% of the installed capacity of thermal power. Measures such as desulphurization, denitrification and installation of high-efficiency dust collectors were adopted. The emission concentration of pollutants can reach the ultra-low emission standard.