File photo taken on June 12, 2012 shows a scene of the Xiaowutai Photovoltaic Plant in Youyu County, north China's Shanxi Province. According to the latest data released by the state energy administration, China has become the world's largest energy producer by the end of 2012. The total installed electricity capacity was 1.14 billion kilowatts, including 249 million of hydropower capacity which was the world's largest. The installed wind power capacity stood at 63 million kilowatts, making China the world's No. 1 in this field. The nuclear power under construction is also the world's largest. (Xinhua/Yan Yan)