Construction of five key pumped-storage power stations has begun in southern China, marking a significant step for sustainable energy storage. These facilities use the gravitational potential energy of water to store surplus energy from variable renewable sources, such as solar and wind. With a total installed capacity of six million kilowatts and an investment of about 40 billion yuan (approximately 5.5 billion U.S. dollars), the stations are slated for completion by the end of 2029.