9. what happened in china in the period between the han and the sui dynasties?

The Sui Dynasty reunited China in only one nation by bringing together the feudal states, this laid the foundation for the next dynasty, the Han. on the other hand in Han dynasty, the feudalism declined and the figure of the empire was established in China. Slavery was expanded rapidly during the former of the Han dynasty.

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explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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