Which river is known as sorrow of China and Why?

Question

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?

Answer 1

Mother river, China's Sorrow, and cradle of Chinese civilization. Traditionally, it is believed that the Chinese civilization originated in the Yellow River basin. The Chinese refer to the river as "the Mother River" and "the cradle of the Chinese civilization".