Hydropower has always been the second largest source of electricity in China. Unlike in developed countries, where the development of conventional large hydropower has nearly stopped and damming a large river is considered environmentally unsustainable, China is still building many new large hydropower projects by adding dams on rivers. The growth of hydro-power capacity in China has indeed picked up speed since the early 2000s (Figure 6.1). Large-scale conventional hydropower is the dominant part of China’s renewable energy.