2. why is the huang he river called china's sorrow? why did the shang pray to their ancestors? how did they communicate with their spirit gods? how did the mandate of heaven determine the rise and fall of dynasties in china?

Why the Huang He is called China's sorrow

The earliest civilization in China settled on the banks of the Huang He. Ever since, the river has been a source of life and death (in the form of new soil and floods).

Other interesting facts

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The flood of 1931

The flood of 1931 was the most horrible flood in Chinese history. Over 1 million people died from this flood.

No Escape From The Horror

The river is unpredictable. It has had 5 major course changes in Chinese history, resulting in death and destruction.

Sources

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.