China’s huge commitment to renewable energy, from vast solar farms in Xinjiang to offshore wind projects in Guangdong, is a well-known success story — such plants together accounted for over a third of the country’s total electricity generation last year.  Getting the price right for all the power those wind and solar plants produce, to ensure it doesn’t go to waste and China’s energy system becomes less polluting, has been more of an issue. An excerpt from a National Develo