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The Four Great Inventions are remarkable achievements in ancient China, making significant contributions to the progress of human civilization.
Compass: The invention of the compass is the result of China's ancient working - people's understanding of object magnetism through long - term practice. Due to productive labor, they found the characteristic of the magnet pointing to the direction. After numerous experiments and research, the compass was finally invented. When introduced to Europe, it played a crucial role in navigation, facilitating overseas exploration and trade.
Gunpowder: Gunpowder is made by mixing niter, sulfur, and charcoal. In ancient times, people used catapults to throw lit gunpowder bags at enemies, which was the most primitive form of cannon. It later revolutionized warfare and also had an impact on the development of fireworks.
Papermaking: The invention of papermaking was a remarkable contribution to world civilization. In the Eastern Han Dynasty (A.D. 105), Cai Lun, based on the experience of his predecessors in silk - weaving, made vegetable - fiber paper from materials such as bark, broken fishing nets, and rags. From then on, paper became a widely used writing material.
Typography: Typography started with woodblock printing in the Sui Dynasty. Characters were carved in relief on wooden blocks, then inked and printed on paper. This invention greatly promoted the spread of knowledge and culture.
In conclusion, the Four Great Inventions left a glorious chapter in the history of human science and culture.
四大发明是中国古代了不起的成就，为人类文明的进步做出了重大贡献。
指南针：指南针的发明是中国古代劳动人民在长期实践中对物体磁性认识的结果。由于生产劳动，他们发现了磁铁指向方向的特性。经过无数次的实验和研究，最终发明了指南针。当指南针传入欧洲后，它在航海中发挥了关键作用，促进了海外探险和贸易。
火药：火药是由硝石、硫磺和木炭混合制成的。在古代，人们用投石机将点燃的火药包投向敌人，这是最原始的火炮形式。后来它彻底改变了战争方式，也对烟花的发展产生了影响。
造纸术：造纸术的发明是对世界文明的卓越贡献。东汉和帝元兴元年（公元105年），蔡伦在前人织丝经验的基础上，用树皮、破渔网、破布等材料制成了植物纤维纸。从那时起，纸成为了广泛使用的书写材料。
印刷术：印刷术始于隋朝的雕版印刷。人们在木板上雕刻出凸起的反字，然后涂上墨汁，印在纸上。这项发明极大地促进了
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