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SEPCOIII Electric Power Construction Co., Ltd. is a wholly-owned A-level subsidiary of POWERCHINA, established in 1985. It is a comprehensive construction group that mainly contracts various types of power stations, seawater desalination, infrastructure and other engineering construction through EPCO, EPC, and other methods. It is widely involved in project investment, project planning, design consulting, equipment procurement supervision, ocean transportation, construction and installation, commissioning and operation, and other fields, we can provide customers with a full range of services including project planning to feasibility study, financing, survey, design, procurement, construction, commissioning, operation and maintenance, maintenance and renovation. SEPCOIII has special qualification for general contracting of power engineering construction, Class A qualification for engineering design and power industry, Class I qualification for general contracting of construction engineering, Class I qualification for general contracting of municipal public engineering construction, Class I qualification for general contracting of highway engineering construction, Class I qualification for professional contracting of steel structure, Class I qualification for power supply engineering commissioning, Class A qualification for thermal power, wind power and photovoltaic power generation equipment supervision.

As a pioneer in "the Silk Road" of electricity, a practitioner of the "the Belt and Road" initiative, and an important participant in the national "going out" strategy, SEPCOIII has won China’s Luban Prize for 10 times and National High Quality Engineering-Gold Award for 9 times. As of now, SEPCOIII has developed in 28 countries in the Middle East, South Asia, Southeast Asia, Africa, Europe and other regions for many years. In recent years, SEPCOIII has been awarded the "Advanced Collective of Central Enterprises" and "National Labor Award".

SEPCOIII is a national-level high-tech enterprise, has provincial-level enterprise technology center. SEPCOIII bases on the international EPC projects, strives to develop engineering technology, lucubrates sea water desalination & solar power generation technology and the exploitation & execution of renewable energy projects, and masters the core technology of sea water treatment & low-carbon energy in field of high-tech & environmental protection.

SEPCOIII maintains a good cooperation relationship with many electric power equipment manufacturers, design institutes, and financial institutions both in China and abroad. Many foreign ambassadors in China regard SEPCOIII as the most reliable Chinese electric power construction company.