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Created a 12 month calendar with 365 1/4 days, based on the moons cycle
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invented the compass
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built the Great Wall across Northern China
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Developed paper made of hemp fibers
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Built the Grand Canal
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block printing was invented
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Perfected gunpowder
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Used decimal and fractional numbers
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Moved the capital from Nanjing to Beijing
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The Imperial Encyclopedia was written
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