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China's installed wind power capacity that transmits power into the national elec-tricity grid rose 11.81 million kW in the first half of this year， doubling the figure of a year earlier， an industry expert said on August 2.

Shu Yinbiao， vice general manager of the State Grid Corporation， said the in-stalled wind power capacity soared 101 percent year on year by the end of June， show-ing the country's strengthened efforts on using renewable energy.