The Yangtze and Mekong are two of the world's longest rivers. The Yangtze is the longest river in Asia, stretching 6, 300 km (3, 915 miles) from its source in the Tibetan Plateau to its mouth in the East China Sea. The Mekong is the 12th longest river in the world, running 4, 350 km (2, 703 miles) from its source in the Tibetan Plateau to its mouth in the South China Sea. Both rivers are important sources of water, food, and transportation for millions of people living in their respective basins.