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Pi calculated as : The ancient Egyptians, Babylonians, Indians, and Greeks had long made approximations for π by the time the Chinese mathematician and astronomer Liu Xin (c. 46 BC–23 AD) improved the old Chinese approximation of simply 3 as π to 3.1547 as π (with evidence on vessels dating to the Wang Mang reign period, 9–23 AD, of ...
This sub-section is about paper making; for the writing material first used in ancient Egypt, see papyrus.. Paper: Although it is recorded that the Han dynasty (202 BC – AD 220) court eunuch Cai Lun (50 AD – AD 121) invented the pulp papermaking process and established the use of new materials used in making paper, ancient padding and wrapping paper artifacts dating from the 2nd century BC ...
Among the engineering accomplishments of early China were matches, dry docks, the double-action piston pump, cast iron, the iron plough, the horse collar, the multi-tube seed drill, the wheelbarrow, the suspension bridge, the parachute, natural gas as fuel, the raised-relief map, the propeller, the sluice gate, and the pound lock.
The four inventions do not necessarily summarize the achievements of science and technology in ancient China. The four inventions were regarded as the most important Chinese achievements in science and technology, simply because they had a prominent position in the exchanges between the East and the West and acted as a powerful dynamic in the ...
Six Dynasties (Chinese: 六朝; pinyin: Liù Cháo; 220–589 or 222–589 [1]) is a collective term for six Han-ruled Chinese dynasties that existed from the early 3rd century AD to the late 6th century AD, between the end of the Eastern Han dynasty and the beginning of the Sui dynasty.
China was a global scientific and technological leader up until the early years of the Ming dynasty.Ancient and medieval Chinese discoveries and Chinese innovations such as papermaking, printing, the compass, and gunpowder (the Four Great Inventions) contributed to the economic development of ancient and medieval East Asia, the Middle East and Europe.
Throughout Chinese history, China had multiple periods of golden age. In Chinese historiography, golden ages on a large scale are known as shèngshì (盛世, lit. Prosperous Era), while golden ages on a smaller scale are termed as zhìshì (治世, lit. Well-Governed Era).
This is a timeline of Chinese history, comprising important legal and territorial changes and political events in China and its dynasties. To read about the background to these events, see History of China. See also the list of Chinese monarchs, Chinese emperors family tree, dynasties of China and years in China.