Technicians explain to visitors how solar photovoltaic (PV) power works in Dunhuang, Northwest China's Gansu province, May 17, 2010. The 10 MW solar PV power plant involves a total investment of 203 million yuan and will generate on average 18 million kilowatt-hours (kWh) per year. The construction of the plant will be completed by June, Xinhua reported. [Photo/Xinhua]
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