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Papermaking became an important industry in China, some of the easliest Chinese paper was probably made from hemp and then soon they made it from the bark of mulberry trees. Later, they used rags. They were the only ones who knew the secret to papermaking but then finally traveled to other countries.
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Steel was a very useful metal . It is made of iron, but it is less brittle than iron and easier to bend into different shapes. They were the first to learn how to make steel, by melting and molding iron ore. Later they learned that blowing into melted iron causes a chemical reaction which created steel.
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Tea drinking wasn't always just used for enjoying, it was mostly used as medicine. Tea was made by letting tea leaves steep in boiling water. During the Tang Dynasty, the first tea-plant seeds were brought to Japan. They started to trade and farm the tea which made the tea spread around the world and become very popular.
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to make these clocks work they used dripping water which made the wheel turn that made the wheel turn every 24 hours. Every quarter hour drums would beat and every hour bells would chime.
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Alchemists accidentally discovered gunpowder when working with salpeter trying to find secret to eternal life.
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When they first found saltpeter, they may have believed that saltpeter could extend life. They soon discovered that it could be used to make an explosive powder.
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Before paper money, coins were the only type of paying worth. Paper money was developed from wooden blocks but by 1107, song printers were used to make each paper bill using lots of color.
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To make game cards you would have to use wood block printers using thick paper. Then they would have famous artists draw the designs on the back of the cards. From then on now game gards are very popular.
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Rockets were developed in China during the Song dynasty, which were powered by a black powder made of saltpeter, charcoal, and sulfur.
