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The Chinese invented tea for use as medicine. They made it by letting tea leaves steep in boiling water.
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The Chinese alchemists' invented gunpowder accidentally while trying to figure out the secret recipe to the immortality for humans.
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Steel was made with iron, but it is less brittle than iron. They used cast iron, because the cast iron caused a chemical reaction to make steel.
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The Chinese invented paper for art using hemp, bark, and then rags.
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Porcelain was invented in the 1st century B.C. for pottery and vases.
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Regular bridges took much more material to build, so the Chinese took a segment out of the bridge to use less material, making a semi-circle shape under the bridge.
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They invented printing by putting ink on a table, then putting paper down. Then, they had a rolling pin with letters sticking out of it, so the ink would press on the paper when rolled and the letters would print.
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The Chinese invented the flamethrower following the invention of gunpowder. They were powered with a mixture of gunpowder and oil. When they fired it, a stream of flames came out the front, hence the name flamethrower.
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The Chinese invented the canal lock to improve the convenience of transportation using boats for everyday life
