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The Chinese invented the first compass as early as the 3rd century B.C.E. The first Chinese compass were pieces of a magnetic mineral called lodestone.
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The first Chinese first made steel, a very useful metal, before 200 B.C.E. Steel is made from iron, but it is less brittle than iron and easier to bend into different shapes.
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Porcelain is another Chinese invention that is a fine pottery. Some historians think that the Chinese produced the first porcelain as early as the 1st century C.E.
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The earliest Chinese paper was probably made from hemp and then bark of a mulberry tree. Eventually, the Chinese used rags.
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The invention of paper made another key development possible: printing. The printer drew first characters ( symbols) on paper.
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With the same technique as game cards, they were invented by wood blocks. These bills would have many colors.
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The clock was accurate than earlier timekeeping devices. The Chinese devised a wheel that made one complete turn every 24 hours.
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Chinese alchemists looking for a substance that would allow you to live forever accidentally create gunpowder.
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Printers used woodblock printing to make the cards from thick paper. Famous artists design on the back of the cards.
