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the magnetic compass was used to find the direction
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steel is made from iron but is less brittle and is easier to bend into differnt shapes
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porcelain is beautiful pottery that is sturdy that looks delicate.porcelain is still called China.
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the mechanical clock was used to complete one full turn every 24 hours.dripping water was used to make the wheel turn.
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the tea was really created in 2700 b.c but didn't get popular till 8th century.
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chinese alchemist accidentally discovered gunpowder when looking for the secret to eternal life.
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the paper money was used to pay and to make cards.
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the movable type was used to type but you had to print it on paper for it to appear
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paper was useful for recording and transmiting information
