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Porcelain making became a major industry in China. Hundreds of thousands of people
worked to mass-produce dishes, bowls, and vases. Some workers washed the clay.
Others applied the glaze or operated the kiln. -
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Compasses made long sea voyages possible because sailors could figure out directions even without a landmark or a point in the sky to steer by. The compass remains an important navigational tool today.
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Paper money was invented by the Chinese in the late 8th or early 9th century. Before that time, coins were the only
form of currency. Like game cards, paper money was printed with wood blocks. -
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Game cards were invented in China in about the 9th century.
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