The Yangtze River (Chang Jiang) in China is the world's busiest river by commercial traffic volume. It stretches 6,300 km (3,900 mi) from the Tibetan Plateau to the East China Sea, making it the third-longest river globally (after the Nile and Amazon). The Yangtze serves as a vital transportation artery for China's industrial heartland, moving massive quantities of cargo, passengers, and raw materials. Its basin hosts over 400 million people and generates ~20% of China's GDP. The Three Gorges Dam, the world's largest hydroelectric project, regulates flow and generates power.