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The Great Wall of China ( traditional Chinese: 萬里長城; simplified Chinese: 万里长城; pinyin: Wànlǐ Chángchéng, literally "ten thousand li long wall") is a series of fortifications that were built across the historical northern borders of ancient Chinese states and Imperial China as protection against various nomadic groups from ...
Course of the Wall throughout history. The history of the Great Wall of China began when fortifications built by various states during the Spring and Autumn (771–476 BC) [1] and Warring States periods (475–221 BC) were connected by the first emperor of China, Qin Shi Huang, to protect his newly founded Qin dynasty (221–206 BC) against incursions by nomads from Inner Asia.
The Ming Great Wall ( Chinese: 明長城; pinyin: Ming changcheng ), built by the Ming dynasty (1368–1644), forms the most visible parts of the Great Wall of China today. A comprehensive archaeological survey, using advanced technologies, has concluded that the Ming walls measure 8,850 km (5,500 mi) from Jiayu Pass in the west to the sea in ...
The nanometre ( SI symbol: nm) is a unit of length in the metric system equal to 10−9 metres ( 1 1 000 000 000 m = 0.000 000 001 m ). To help compare different orders of magnitude, this section lists lengths between 10 −9 and 10 −8 m (1 nm and 10 nm). 1 nm – diameter of a carbon nanotube.
e. Map showing the areas covered by NGA charts. Dangerous Ground is a large area in the southeast part of the South China Sea characterized by many low islands and cays, sunken reefs, and atolls awash, with reefs often rising abruptly from ocean depths greater than 1,000 metres (3,300 ft). There are few precise definitions, but Dangerous Ground ...
The Ming dynasty ( / mɪŋ / MING ), [ 7] officially the Great Ming, was an imperial dynasty of China, ruling from 1368 to 1644 following the collapse of the Mongol -led Yuan dynasty. The Ming dynasty was the last imperial dynasty of China ruled by the Han people, the majority ethnic group in China. Although the primary capital of Beijing fell ...
Li. (unit) Map of the eastern South China Sea from 1588; each grid square is 400 li (about 133 km or 80 miles). Li ( Chinese: 里, lǐ, or 市里, shìlǐ ), also known as the Chinese mile, [citation needed] is a traditional Chinese unit of distance. The li has varied considerably over time but was usually about one third of an English mile and ...
Geography of China; Continent: Asia: Region: East/Southeast Asia: Coordinates: 1]: Area: Ranked 4: • Total: 9,596,960 [1] km 2 (3,705,410 sq mi): • Land: 97.2 [1] %: • Water: 2.8 [1] %: Coastline: 14,500 [1] km (9,000 mi): Borders: Afghanistan, Bhutan, Myanmar, India, North Korea, Kazakhstan, Kyrgyzstan, Pakistan, Laos, Mongolia, Nepal, Russia, Tajikistan, Vietnam: Highest point: Mount ...