1, Zhang Heng invented geodesy. Geodesy is a masterpiece created by Zhang Heng, a Chinese scientist of the Eastern Han Dynasty. Zhang Heng was in the Eastern Han Dynasty, earthquakes are more frequent. Zhang Heng has a lot of personal experience of earthquakes, in order to grasp the dynamics of the national earthquake, he after years of research, and finally in the first year of Yangjia (A.D. 132) invented the wind geodesic instrument, which is also the world's first geodesic instrument.
2, movable type printing. Printing is one of the four great inventions of the ancient Chinese working people. Engraving printing was invented in the Tang Dynasty and was commonly used in the middle and late Tang Dynasty. Bi Sheng invented movable-type printing during Song Renzong. Although movable type printing appeared in the Song Dynasty, it was not in general use, while engraved printing was still commonly used.
3. Papermaking. Cai Lun improved the art of papermaking in the Yuanxingyuan year (105) of the Eastern Han Dynasty. He used the bark, hemp head and my cloth, fishnet and other raw materials, after thwarting, pounding, frying, baking and other processes to manufacture paper, is the origin of modern paper. This kind of paper, the raw materials of which were easy to find and cheap, and the quality of which was also improved, gradually came into general use. In honor of Cai Lun's achievements, later generations called this paper "Cai Hou paper".
4, gunpowder. China was the first country to invent gunpowder, the Sui dynasty, the birth of saltpeter, sulfur and charcoal ternary system gunpowder. Black gunpowder officially appeared in the Tang Dynasty. Gunpowder was invented by ancient alchemists, from the Warring States period to the beginning of the Han Dynasty, the emperors and aristocrats were intoxicated with the fantasy of being immortal and immortality, driving some priests and Taoist priests to refine the "elixir of immortality", and gradually invented the formula of gunpowder in the refining process.
5, walking lanterns. Around 1000 A.D., the Chinese created the lanterns, the ancient books have about the lanterns described. Walking horse lamp on a flat impeller, under the burning candle or lamp, hot gas rises to drive the impeller rotating, is the original application of modern gas turbine working principle.