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They also invented paper. In medicine, acupuncture was invented. Also, the Chinese discovered the circulatory system. In technology, they invented an iron plow, rudder for steering ships, the seismoscope for detecting earthquakes, a compass, and a wheelbarrow for hauling goods.
Ancient China is celebrated for a range of technological achievements. Four major inventions often highlighted are gunpowder, paper, the compass, and printing. Gunpowder was invented in the 9th century CE and revolutionized warfare and mining. The invention of paper around the 2nd century CE by Cai Lun greatly facilitated record-keeping, literature, and education. The magnetic compass, developed during the Han Dynasty, improved navigation and exploration. The invention of movable type printing during the Song Dynasty (11th century CE) allowed for the mass production of books and the spread of knowledge. These innovations had profound impacts on Chinese society and the world at large.