Generating wind power requires not only the right geological and wind conditions but also human strength and commitment. To build a wind farm in central China's Hunan Province, technicians had to work day and night in the remote, mountainous regions and complete challenging tasks high up in the sky. /VCG Photo

To erect a wind turbine often takes days. Even with help from crane machines, workers needed to manually adjust the position of equipment and install major power units by themselves. /VCG Photo

To secure the blades, technicians had to conquer their fear of height and perform challenging tasks 60 meters above the ground. /VCG Photo

As the project began in summer, workers had to bear with the blazing sun and the heat. /VCG Photo

A worker managed to create a sanctuary for himself by setting up a hammock under the truck. /VCG Photo