Huang He
The Yellow River or Huang He is the third-longest river in Asia, following the Yangtze River and Yenisei River, and the sixth-longest in the world at the estimated length of 5,464 km (3,395 mi)
China has blocked a tributary as part of the construction of its "most expensive" hydro-power project that could cause concern in India as it may impact water flows into the lower riparian countries.
What is the name of tributary and main river?