Workers from Ningdong Power Supply Bureau of Ningxia Hui Autonomous Region maintain the outbound power transmission tower on Oct. 2. The national electricity load increased sharply because of the decreasing temperature. As of now, Ningxia has transmitted 20.2 billion kilowatt-hours of electricity to the central and northern China's region that is short on power. It looks to subscribe 24.9 billion kilowatt-hours in the whole year of 2011. [Photo: Xinhua]