 To move the water through the drainage divide between these rivers, huge dams and long tunnels are needed to cross the Tibetan Plateau and Western Yunnan Plateaus.This route is designed to bring 3.8 billion m3 of water from three tributaries of the Yangtze River about 450 km across the Bayankala Mountains to northwest China.The Tongtian diversion line would be 289 km long, the Yalong 131 km, and the Dadu 30 km.