The history of the Great Wall of China began when fortifications built by various states during the Spring and Autumn (771–476 BC) and Warring States periods (475–221 BC) were connected by the first emperor of China, Qin Shi Huang, to protect his newly founded Qin dynasty (221–206 BC) against incursions by nomads from
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probably electronics/the internet
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Will the United States succeed in a changing world?
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The Chinese Immigration Act, 1923, known today as the Chinese Exclusion Act (the duration of which has been dubbed the Exclusion Era), was an act passed by the Parliament of Canada, banning most forms of Chinese immigration to Canada
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