Around 220 B.C., Qin Shi Huang, the first emperor of a unified China under the Qin Dynasty, ordered that earlier fortifications between states be removed and a number of existing walls along the northern border be joined into a single system that would extend for more than 10,000 li (a li is about one-third of a mile) .
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two or more kinds of what??
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The delegates placed a similar fugitive slave clause in the Constitution. This was part of a deal with New England states. ... It also resulted in the illegal kidnapping and return to slavery of thousands of free blacks. The three-fifths compromise increased the South's representation in Congress and the Electoral College.
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