People work at a factory of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province, June 1, 2015. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua/Wang Jianwei)

People work at a factory of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province, June 1, 2015. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua/Wang Jianwei)

People work at a factory of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province, June 1, 2015. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua/Wang Jianwei)

People work at a factory of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province, June 2, 2015. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua/Wang Jianwei)

File photo taken on April 1, 2014 shows Guddu combined cycle power station built by Harbin Electric International Company Ltd. (HEI) in . As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua)

People work at a factory of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province, June 2, 2015. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua/Wang Jianwei)

People work at a factory of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province, June 2, 2015. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua/Wang Jianwei)

Photo taken on Dec. 19, 2011 shows Salaya II power project built by Harbin Electric International Company Ltd. (HEI) in India. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua)

File photo taken on Feb. 4, 2015 shows the project of "130-150 MW Power Generating Unit with Heat Extraction for High-Ash Coal Burning at Angren TPP" built by Harbin Electric International Company Ltd. (HEI) in Uzbekistan. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua)

Photo taken on June 2, 2015 shows the headquarters of Harbin Electric International Company Ltd. (HEI) in Harbin, capital of northeast China's Heilongjiang Province. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua)

This undated file photo shows a 1×210MW power station built by Harbin Electric International Company Ltd. (HEI) in Pakistan in 1983. As China's leading large-scale enterprise in power project contracting and export of power equipment, HEI has undertaken contracts to build large-scale power plant turnkey projects and provide complete equipment for power plants in more than 20 countries and regions, installing over 33,000mw in the process. (Xinhua)