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89-491: 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 the Eurasian Steppe . Several walls were built from as early as

178-725: A "Great Wall" has not been agreed upon, making the full course of the Great Wall difficult to describe in its entirety. The defensive lines contain multiple stretches of ramparts, trenches and ditches, as well as individual fortresses. In 2012, based on existing research and the results of a comprehensive mapping survey, the National Cultural Heritage Administration of China concluded that the remaining Great Wall associated sites include 10,051 wall sections, 1,764 ramparts or trenches, 29,510 individual buildings, and 2,211 fortifications or passes, with

267-509: A certain extent in South Korea , remain virtually identical to traditional characters, with variations between the two forms largely stylistic. There has historically been a debate on traditional and simplified Chinese characters . Because the simplifications are fairly systematic, it is possible to convert computer-encoded characters between the two sets, with the main issue being ambiguities in simplified representations resulting from

356-619: A local equation with metric units. For instance, the Hong Kong catty is precisely 604.789 82  g . Note: The names lí ( 釐 or 厘 ) and fēn ( 分 ) for small units are the same for length, area, and mass; however, they refer to different kinds of measurements. According to the Liji , the legendary Yellow Emperor created the first measurement units. The Xiao Erya and the Kongzi Jiayu state that length units were derived from

445-475: A total length of more than 10 km (6 mi), believed to be part of the Great Wall, were discovered along the border of Ningxia autonomous region and Gansu province. Before the use of bricks, the Great Wall was mainly built from rammed earth, stones, and wood. During the Ming, however, bricks were heavily used in many areas of the wall, as were materials such as tiles, lime , and stone. The size and weight of

534-467: A transportation corridor. The frontier walls built by different dynasties have multiple courses. Collectively, they stretch from Liaodong in the east to Lop Lake in the west, from the present-day Sino–Russian border in the north to Tao River (Taohe) in the south; along an arc that roughly delineates the edge of the Mongolian steppe ; spanning 21,196.18 km (13,170.70 mi) in total. Today,

623-810: Is figurative in a similar manner to the Greek and English myriad and simply means "innumerable" or "immeasurable". Because of the wall's association with the First Emperor's supposed tyranny , the Chinese dynasties after Qin usually avoided referring to their own additions to the wall by the name "Long Wall". Instead, various terms were used in medieval records, including "frontier(s)" ( 塞 , Sài ), "rampart(s)" ( 垣 , Yuán ), "barrier(s)" ( 障 , Zhàng ), "the outer fortresses" ( 外 堡 , Wàibǎo ), and "the border wall(s)" ( t 邊 牆 , s 边 墙 , Biānqiáng ). Poetic and informal names for

712-812: Is 産 (also the accepted form in Japan and Korea), while in Hong Kong, Macau and Taiwan the accepted form is 產 (also the accepted form in Vietnamese chữ Nôm ). The PRC tends to print material intended for people in Hong Kong, Macau and Taiwan, and overseas Chinese in traditional characters. For example, versions of the People's Daily are printed in traditional characters, and both People's Daily and Xinhua have traditional character versions of their website available, using Big5 encoding. Mainland companies selling products in Hong Kong, Macau and Taiwan use traditional characters in order to communicate with consumers;

801-563: Is 7.8 m (25 ft 7 in) high and 5 m (16 ft 5 in) wide. One of the most striking sections of the Ming Great Wall is where it climbs extremely steep slopes in Jinshanling . There it runs 11 km (7 mi) long, ranges from 5 to 8 m (16 ft 5 in to 26 ft 3 in) in height, and 6 m (19 ft 8 in) across the bottom, narrowing up to 5 m (16 ft 5 in) across

890-581: Is no more conspicuous than many other human-made objects. Veteran US astronaut Gene Cernan has stated: "At Earth orbit of 100 to 200 miles [160 to 320 km] high, the Great Wall of China is, indeed, visible to the naked eye." Ed Lu , Expedition 7 Science Officer aboard the International Space Station , adds that, "It's less visible than a lot of other objects. And you have to know where to look." In October 2003, Chinese astronaut Yang Liwei stated that he had not been able to see

979-527: Is only exceeded by the Chinese Wall, which makes a considerable figure upon the terrestrial globe , and may be discerned at the Moon." The claim was also mentioned by Henry Norman in 1895 where he states "besides its age it enjoys the reputation of being the only work of human hands on the globe visible from the Moon." The issue of "canals" on Mars was prominent in the late 19th century and may have led to

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1068-720: Is the western terminus of the Ming Great Wall. From Jiayu Pass the wall travels discontinuously down the Hexi Corridor and into the deserts of Ningxia , where it enters the western edge of the Yellow River loop at Yinchuan . Here the first major walls erected during the Ming dynasty cut through the Ordos Desert to the eastern edge of the Yellow River loop. There at Piantou Pass ( t 偏 頭 關 , s 偏 头 关 , Piāntóuguān ) in Xinzhou , Shanxi province,

1157-493: The Chinese Commercial News , World News , and United Daily News all use traditional characters, as do some Hong Kong–based magazines such as Yazhou Zhoukan . The Philippine Chinese Daily uses simplified characters. DVDs are usually subtitled using traditional characters, influenced by media from Taiwan as well as by the two countries sharing the same DVD region , 3. With most having immigrated to

1246-520: The Kensiu language . Traditional Chinese units In the present day, the People's Republic of China maintains some customary units based upon the market units but standardized to round values in the metric system , for example the common jin or catty of exactly 500   g . The Chinese name for most metric units is based on that of the closest traditional unit; when confusion might arise,

1335-672: The Liaodong province, protecting it against potential incursions by Jurchen-Mongol Oriyanghan from the northwest and the Jianzhou Jurchens from the north. While stones and tiles were used in some parts of the Liaodong Wall, most of it was in fact simply an earth dike with moats on both sides. Towards the end of the Ming, the Great Wall helped defend the empire against the Manchu invasions that began around 1600. Even after

1424-618: The Ming dynasty that the traditional system was revised. On 7 January 1915, the Beiyang government promulgated a measurement law to use not only metric system as the standard but also a set of Chinese-style measurement based directly on the Qing dynasty definitions ( 营造尺库平制 ). On 16 February 1929, the Nationalist government adopted and promulgated The Weights and Measures Act to adopt

1513-626: The Moon . Even though the myth is thoroughly debunked, it is still ingrained in popular culture. The apparent width of the Great Wall from the Moon would be the same as that of a human hair viewed from 3 km (2 mi) away. One of the earliest known references to the myth that the Great Wall can be seen from the moon appears in a letter written in 1754 by the English antiquary William Stukeley . Stukeley wrote that, "This mighty wall [ Hadrian's wall ] of four score miles [130 km] in length

1602-575: The National Cultural Heritage Administration states that 22% of the Ming Great Wall has disappeared, while 1,961 km (1,219 mi) of wall have vanished. In 2007 it was estimated that more than 60 km (37 mi) of the wall in Gansu province may disappear in the next 20 years, due to erosion from sandstorms . In some places, the height of the wall has been reduced from more than 5 m (16 ft 5 in) to less than 2 m (6 ft 7 in). Various square lookout towers that characterize

1691-609: The Qin dynasty ("Qin Shi Huang") in 221 BC. Intending to impose centralized rule and prevent the resurgence of feudal lords, he ordered the destruction of the sections of the walls that divided his empire among the former states. To position the empire against the Xiongnu people from the north, however, he ordered the building of new walls to connect the remaining fortifications along the empire's northern frontier. "Build and move on"

1780-640: The Shanghainese -language character U+20C8E 𠲎 CJK UNIFIED IDEOGRAPH-20C8E —a composition of 伐 with the ⼝   'MOUTH' radical—used instead of the Standard Chinese 嗎 ; 吗 . Typefaces often use the initialism TC to signify the use of traditional Chinese characters, as well as SC for simplified Chinese characters . In addition, the Noto, Italy family of typefaces, for example, also provides separate fonts for

1869-608: The State Council of the People's Republic of China on 25 June 1959, but 1 catty being 500 grams, would become divided into 10 (new) taels , instead of 16 (old) taels, to be converted from province to province , while exempting Chinese prescription drugs from the conversion to prevent errors. On 27 February 1984, the State Council of the People's Republic of China decreed the market system to remain acceptable until

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1958-576: The Warring States period , Qin Shi Huang unified China, and later standardized measurement units. In the Han dynasty , these measurements were still being used, and were documented systematically in the Book of Han . Astronomical instruments show little change of the length of chi in the following centuries, since the calendar needed to be consistent. It was not until the introduction of decimal units in

2047-508: The metric system as the official standard and to limit the newer Chinese units of measurement ( Chinese : 市用制 ; pinyin : shìyòngzhì ; lit. 'market-use system') to private sales and trade in Article 11, effective on 1 January 1930. These newer "market" units are based on rounded metric numbers. The Government of the People's Republic of China continued using the market system along with metric system, as decreed by

2136-558: The rampart which surrounded traditional Chinese cities and was used by extension for these walls around their respective states ; today, however, it is much more often the Chinese word for "city". The longer Chinese name "Ten-Thousand Mile Long Wall" ( t 萬里長城, s 万里长城, Wànlǐ Chángchéng ) came from Sima Qian's description of it in the Records , though he did not name the walls as such. The AD 493 Book of Song quotes

2225-605: The 13th and 14th centuries, such as Giovanni da Pian del Carpine , William of Rubruck , Marco Polo , Odoric of Pordenone and Giovanni de' Marignolli , mentioned the Great Wall. The North African traveler Ibn Battuta , who also visited China during the Yuan dynasty c.  1346 , had heard about China's Great Wall, possibly before he had arrived in China. He wrote that the wall is "sixty days' travel" from Zeitun (modern Quanzhou ) in his travelogue Gift to Those Who Contemplate

2314-483: The 7th century BC, with selective stretches later joined by Qin Shi Huang (220–206 BC), the first emperor of China . Little of the Qin wall remains. Later on, many successive dynasties built and maintained multiple stretches of border walls. The best-known sections of the wall were built by the Ming dynasty (1368–1644). Apart from defense, other purposes of the Great Wall have included border controls , allowing

2403-505: The Chinese word 絲 (T) or 丝 (S) sī is used to express 0.01 mm. These correspond to the measures listed simply as "China" in The Measures, Weights, & Moneys of All Nations Metric and other standard length units can be squared by the addition of the prefix 平方 píngfāng . For example, a square kilometre is 平方公里 píngfāng gōnglǐ . These units are used to measure cereal grains, among other things. In imperial times,

2492-547: The Grand Historian , where it referred both to the separate great walls built between and north of the Warring States and to the more unified construction of the First Emperor . The Chinese character 城 , meaning city or fortress, is a phono-semantic compound of the "earth" radical 土 and phonetic 成 , whose Old Chinese pronunciation has been reconstructed as * deŋ . It originally referred to

2581-655: The Great Wall at great cost to defend themselves against northern invaders. The Tang and Song dynasties did not undertake any significant effort in the region. Dynasties founded by non-Han ethnic groups also built their border walls: the Xianbei -ruled Northern Wei , the Khitan -ruled Liao , Jurchen -led Jin and the Tangut -established Western Xia , who ruled vast territories over Northern China throughout centuries, all constructed defensive walls but those were located much to

2670-539: The Great Wall of China. In response, the European Space Agency (ESA) issued a press release reporting that from an orbit between 160 and 320 km (100 and 200 mi), the Great Wall is visible to the naked eye. The image was actually a river in Beijing. Leroy Chiao , a Chinese-American astronaut, took a photograph from the International Space Station that shows the wall. It was so indistinct that

2759-573: The Great Wall splits in two with the "Outer Great Wall" ( t 外 長城 , s 外 长城 , Wài Chǎngchéng ) extending along the Inner Mongolia border with Shanxi into Hebei province, and the "Inner Great Wall" ( t 內 長城 , s 內 长城 , Nèi Chǎngchéng ) running southeast from Piantou Pass for some 400 km (250 mi), passing through important passes like the Pingxing Pass and Yanmen Pass before joining

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2848-557: The Great Wall. Perhaps the first recorded instance of a European actually entering China via the Great Wall came in 1605, when the Portuguese Jesuit brother Bento de Góis reached the northwestern Jiayu Pass from India. Early European accounts were mostly modest and empirical, closely mirroring contemporary Chinese understanding of the Wall, although later they slid into hyperbole, including the erroneous but ubiquitous claim that

2937-484: The Ming walls were the same ones that were built by the first emperor in the 3rd century BC. When China opened its borders to foreign merchants and visitors after its defeat in the First and Second Opium Wars , the Great Wall became a main attraction for tourists. The travelogues of the later 19th century further enhanced the reputation and the mythology of the Great Wall. A formal definition of what constitutes

3026-505: The Outer Great Wall at Sihaiye ( 四海 冶 , Sìhǎiyě ), in Beijing's Yanqing County . The sections of the Great Wall around Beijing municipality are especially famous: they were frequently renovated and are regularly visited by tourists today. The Badaling Great Wall near Zhangjiakou is the most famous stretch of the wall, for this was the first section to be opened to the public in the People's Republic of China, as well as

3115-502: The People's Republic of China, traditional Chinese characters are standardised according to the Table of Comparison between Standard, Traditional and Variant Chinese Characters . Dictionaries published in mainland China generally show both simplified and their traditional counterparts. There are differences between the accepted traditional forms in mainland China and elsewhere, for example the accepted traditional form of 产 in mainland China

3204-532: The United States during the second half of the 19th century, Chinese Americans have long used traditional characters. When not providing both, US public notices and signs in Chinese are generally written in traditional characters, more often than in simplified characters. In the past, traditional Chinese was most often encoded on computers using the Big5 standard, which favored traditional characters. However,

3293-665: The Wonders of Cities and the Marvels of Travelling . He associated it with the legend of the wall mentioned in the Qur'an , which Dhul-Qarnayn (commonly associated with Alexander the Great ) was said to have erected to protect people near the land of the rising sun from the savages of Gog and Magog . However, Ibn Battuta could find no one who had either seen it or knew of anyone who had seen it, suggesting that although there were remnants of

3382-405: The belief that long, thin objects were visible from space. The claim that the Great Wall is visible from the moon also appears in 1932's Ripley's Believe It or Not! strip. A more controversial question is whether the wall is visible from low Earth orbit (an altitude of as little as 160 km (100 mi)). NASA claims that it is barely visible, and only under nearly perfect conditions; it

3471-532: The bibliography is quite vast. The editions of Wu Chenglou's 1937 History of Chinese Measurement were the usual standard up to the 1980s or so, but rely mostly on surviving literary accounts. Newer research has put more emphasis on archeological discoveries. Qiu Guangming & Zhang Yanming's 2005 bilingual Concise History of Ancient Chinese Measures and Weights summarizes these findings. A relatively recent and comprehensive bibliography, organized by period studied, has been compiled in 2012 by Cao & al.; for

3560-404: The bricks made them easier to work with than earth and stone, so construction quickened. Additionally, bricks could bear more weight and endure better than rammed earth. Stone can hold under its own weight better than brick, but is more difficult to use. Consequently, stones cut into rectangular shapes were used for the foundation, inner and outer brims , and gateways of the wall. Battlements line

3649-515: The commanding Ming general, Wu Sangui , who formed an alliance with the Manchus, hoping to use the Manchus to expel the rebels from Beijing. The Manchus quickly seized Beijing, and eventually defeated both the Shun dynasty and the remaining Ming resistance , consolidating the rule of the Qing dynasty over all of China proper . Under Qing rule, China's borders extended beyond the walls and Mongolia

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3738-526: The condition of indicating the corresponding SI values, then for three more years thereafter, Chinese, Imperial, and US units would be permissible as secondary to the SI. Traditional units of length include the chi ( 尺 ), bu ( 步 ), and li ( 里 ). The precise length of these units, and the ratios between these units, has varied over time. 1 bu has consisted of either 5 or 6 chi , while 1 li has consisted of 300 or 360 bu . All "metric values" given in

3827-455: The defensive system of the Great Wall is generally recognized as one of the most impressive architectural feats in history. The collection of fortifications known as the Great Wall of China has historically had a number of different names in both Chinese and English. In Chinese histories , the term "Long Wall(s)" ( t 長城, s 长城, Chángchéng ) appears in Sima Qian 's Records of

3916-601: The east. This section was one of the first to be renovated following the turmoil of the Cultural Revolution . At the edge of the Bohai Gulf is Shanhai Pass , considered the traditional end of the Great Wall and the "First Pass Under Heaven ". The part of the wall inside Shanhai Pass that meets the sea is named the "Old Dragon Head". 3 km (2 mi) north of Shanhai Pass is Jiaoshan Great Wall ( t 焦山 長城 , s 焦 山 长城 , Jiāoshān Chángchéng ),

4005-564: The end of 1990 and ordered the transition to the national legal measures by that time, but farmland measures would be exempt from this mandatory metrication until further investigation and study. In 1976 the Hong Kong Metrication Ordinance allowed a gradual replacement of the system in favor of the International System of Units (SI) metric system. The Weights and Measures Ordinance defines

4094-506: The exact length and course of the Qin walls. Most of the ancient walls have eroded away over the centuries, and very few sections remain today. The human cost of the construction is unknown, but it has been estimated by some authors that hundreds of thousands of workers died building the Qin wall. Later, the Han , the Northern dynasties and the Sui all repaired, rebuilt, or expanded sections of

4183-464: The frontier general Tan Daoji referring to "the long wall of 10,000 miles", closer to the modern name, but the name rarely features in pre-modern times otherwise. The traditional Chinese mile ( 里 , lǐ ) was an often irregular distance that was intended to show the length of a standard village and varied with terrain but was usually standardized at distances around a third of an English mile (540 m). However, this use of "ten-thousand" ( wàn )

4272-525: The human body. According to the Records of the Grand Historian , these human body units caused inconsistency, and Yu the Great , another legendary figure, unified the length measurements. Rulers with decimal units have been unearthed from Shang dynasty tombs. In the Zhou dynasty , the king conferred nobles with powers of the state and the measurement units began to be inconsistent from state to state. After

4361-475: The imposition of duties on goods transported along the Silk Road , regulation or encouragement of trade and the control of immigration and emigration. Furthermore, the defensive characteristics of the Great Wall were enhanced by the construction of watchtowers , troop barracks, garrison stations, signaling capabilities through the means of smoke or fire, and the fact that the path of the Great Wall also served as

4450-493: The inverse is equally true as well. In digital media, many cultural phenomena imported from Hong Kong and Taiwan into mainland China, such as music videos, karaoke videos, subtitled movies, and subtitled dramas, use traditional Chinese characters. In Hong Kong and Macau , traditional characters were retained during the colonial period, while the mainland adopted simplified characters. Simplified characters are contemporaneously used to accommodate immigrants and tourists, often from

4539-519: The long-drawn conflict was taking a toll on the empire. The Ming adopted a new strategy to keep the nomadic tribes out by constructing walls along the northern border of China. Acknowledging the Mongol control established in the Ordos Desert , the wall followed the desert's southern edge instead of incorporating the bend of the Yellow River . Unlike the earlier fortifications, the Ming construction

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4628-458: The loss of all of Liaodong , the Ming army held the heavily fortified Shanhai Pass , preventing the Manchus from conquering the Chinese heartland. The Manchus were finally able to cross the Great Wall in 1644, after Beijing had already fallen to Li Zicheng 's short-lived Shun dynasty . Before this time, the Manchus had crossed the Great Wall multiple times to raid, but this time it was for conquest. The gates at Shanhai Pass were opened on May 25 by

4717-725: The mainland. The increasing use of simplified characters has led to concern among residents regarding protecting what they see as their local heritage. Taiwan has never adopted simplified characters. The use of simplified characters in government documents and educational settings is discouraged by the government of Taiwan. Nevertheless, with sufficient context simplified characters are likely to be successfully read by those used to traditional characters, especially given some previous exposure. Many simplified characters were previously variants that had long been in some use, with systematic stroke simplifications used in folk handwriting since antiquity. Traditional characters were recognized as

4806-682: The majority of Chinese text in mainland China are simplified characters , there is no legislation prohibiting the use of traditional Chinese characters, and often traditional Chinese characters remain in use for stylistic and commercial purposes, such as in shopfront displays and advertising. Traditional Chinese characters remain ubiquitous on buildings that predate the promulgation of the current simplification scheme, such as former government buildings, religious buildings, educational institutions, and historical monuments. Traditional Chinese characters continue to be used for ceremonial, cultural, scholarly/academic research, and artistic/decorative purposes. In

4895-432: The mass of objects. They are also famous for measuring monetary objects such as gold and silver. The Chinese word for gram is 克 kè ; this can take the Chinese standard SI prefixes (for "milli-", "deca-", and so on). A kilogram, however, is commonly called 公斤 gōngjīn , i.e. a metric jīn . These are used for trading precious metals such as gold and silver. As there were hundreds of unofficial measures in use,

4984-983: The merging of previously distinct character forms. Many Chinese online newspapers allow users to switch between these character sets. Traditional characters are known by different names throughout the Chinese-speaking world. The government of Taiwan officially refers to traditional Chinese characters as 正體字 ; 正体字 ; zhèngtǐzì ; 'orthodox characters'. This term is also used outside Taiwan to distinguish standard characters, including both simplified, and traditional, from other variants and idiomatic characters . Users of traditional characters elsewhere, as well as those using simplified characters, call traditional characters 繁體字 ; 繁体字 ; fántǐzì ; 'complex characters', 老字 ; lǎozì ; 'old characters', or 全體字 ; 全体字 ; quántǐzì ; 'full characters' to distinguish them from simplified characters. Some argue that since traditional characters are often

5073-449: The metric, Imperial, and Chinese units. As of 2012, all three systems are legal for trade and are in widespread use. On 24 August 1992, Macau published Law No. 14/92/M to order that Chinese units of measurement similar to those used in Hong Kong, Imperial units , and United States customary units would be permissible for five years since the effective date of the Law, 1 January 1993, on

5162-464: The mortar or any part of the wall, contrary to what a legend states. Communication between the army units along the length of the Great Wall, including the ability to call reinforcements and warn garrisons of enemy movements, was of high importance. Signal towers were built upon hill tops or other high points along the wall for their visibility. Wooden gates could be used as a trap against those going through. Barracks, stables, and armories were built near

5251-506: The most famous images of the wall have disappeared. Many western sections of the wall are constructed from mud , rather than brick and stone, and thus are more susceptible to erosion. In 2014 a portion of the wall near the border of Liaoning and Hebei province was repaired with concrete. The work has been much criticized. A section of the wall in Shanxi province was severely damaged in 2023 by construction workers, who widened an existing gap in

5340-465: The nineteenth century, "the Great Wall of China" had become standard in English and French, although other European languages such as German continue to refer to it as "the Chinese wall". The Chinese were already familiar with the techniques of wall-building by the time of the Spring and Autumn period between the 8th and 5th centuries BC. During this time and the subsequent Warring States period ,

5429-556: The north of the other Great Walls as we know it, within China's autonomous region of Inner Mongolia and in modern-day Mongolia itself. The Great Wall concept was revived again under the Ming in the 14th century, and following the Ming army's defeat by the Oirats in the Battle of Tumu . The Ming had failed to gain a clear upper hand over the Mongol tribes after successive battles, and

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5518-677: The official script in Singapore until 1969, when the government officially adopted Simplified characters. Traditional characters still are widely used in contexts such as in baby and corporation names, advertisements, decorations, official documents and in newspapers. The Chinese Filipino community continues to be one of the most conservative in Southeast Asia regarding simplification. Although major public universities teach in simplified characters, many well-established Chinese schools still use traditional characters. Publications such as

5607-426: The one contained in João de Barros 's 1563 Asia . Other early accounts in Western sources include those of Gaspar da Cruz , Bento de Goes , Matteo Ricci , and Bishop Juan González de Mendoza , the latter in 1585 describing it as a "superbious and mightie work" of architecture, though he had not seen it. In 1559, in his work "A Treatise of China and the Adjoyning Regions", Gaspar da Cruz offers an early discussion of

5696-700: The original standard forms, they should not be called 'complex'. Conversely, there is a common objection to the description of traditional characters as 'standard', due to them not being used by a large population of Chinese speakers. Additionally, as the process of Chinese character creation often made many characters more elaborate over time, there is sometimes a hesitation to characterize them as 'traditional'. Some people refer to traditional characters as 'proper characters' ( 正字 ; zhèngzì or 正寫 ; zhèngxiě ) and to simplified characters as 簡筆字 ; 简笔字 ; jiǎnbǐzì ; 'simplified-stroke characters' or 減筆字 ; 减笔字 ; jiǎnbǐzì ; 'reduced-stroke characters', as

5785-430: The photographer was not certain he had actually captured it. Based on the photograph, the China Daily later reported that the Great Wall can be seen from 'space' with the naked eye, under favorable viewing conditions, if one knows exactly where to look. Traditional Chinese characters Traditional Chinese characters are a standard set of Chinese character forms used to write Chinese languages . In Taiwan ,

5874-460: The physical standard for these was the jialiang . In the case of volume, the market and metric shēng coincide, being equal to one litre as shown in the table. The Chinese standard SI prefixes (for "milli-", "centi-", etc.) may be added to this word shēng . Units of volume can also be obtained from any standard unit of length using the prefix 立方 lìfāng ("cubic"), as in 立方米 lìfāng mǐ for one cubic metre. These units are used to measure

5963-729: The predominant forms. Simplified characters as codified by the People's Republic of China are predominantly used in mainland China , Malaysia, and Singapore. "Traditional" as such is a retronym applied to non-simplified character sets in the wake of widespread use of simplified characters. Traditional characters are commonly used in Taiwan , Hong Kong , and Macau , as well as in most overseas Chinese communities outside of Southeast Asia. As for non-Chinese languages written using Chinese characters, Japanese kanji include many simplified characters known as shinjitai standardized after World War II, sometimes distinct from their simplified Chinese counterparts . Korean hanja , still used to

6052-524: The remainder date back to Northern Wei , Northern Qi , Sui , Tang , the Five Dynasties , Song , Liao and Xixia . About half of the sites are located in Inner Mongolia (31%) and Hebei (19%). Han fortifications starts from Yumen Pass and Yang Pass , southwest of Dunhuang , in Gansu province. Ruins of the remotest Han border posts are found in Mamitu ( t 馬 迷途 , s 马 迷途 , Mǎmítú , l "horses losing their way" ) near Yumen Pass. The Jiayu Pass , located in Gansu province,

6141-405: The set of traditional characters is regulated by the Ministry of Education and standardized in the Standard Form of National Characters . These forms were predominant in written Chinese until the middle of the 20th century, when various countries that use Chinese characters began standardizing simplified sets of characters, often with characters that existed before as well-known variants of

6230-411: The showpiece stretch for foreign dignitaries. The Badaling Great Wall saw nearly 10 million visitors in 2018, and in 2019, a daily limit of 65,000 visitors was instated. South of Badaling is the Juyong Pass ; when it was used by the Chinese to protect their land, this section of the wall had many guards to defend the capital Beijing. Made of stone and bricks from the hills, this portion of the Great Wall

6319-472: The site of the first mountain of the Great Wall. 15 km (9 mi) northeast from Shanhaiguan is Jiumenkou ( t 九 門 口 , s 九 门 口 , Jiǔménkǒu ), which is the only portion of the wall that was built as a bridge. In 2009, 180 km of previously unknown sections of the Ming wall concealed by hills, trenches and rivers were discovered with the help of infrared range finders and GPS devices. In March and April 2015, nine sections with

6408-406: The states of Qin , Wei , Zhao , Qi , Han , Yan , and Zhongshan all constructed extensive fortifications to defend their own borders. Built to withstand the attack of small arms such as swords and spears, these walls were made mostly of stone or by stamping earth and gravel between board frames. King Zheng of Qin conquered the last of his opponents and unified China as the First Emperor of

6497-461: The tables are exact unless otherwise specified by the approximation sign '~'. Certain units are also listed at List of Chinese classifiers → Measurement units . The Chinese word for metre is 米 mǐ ; this can take the Chinese standard SI prefixes (for "kilo-", "centi-", etc.). A kilometre , however, may also be called 公里 gōnglǐ , i.e. a metric lǐ . In the engineering field, traditional units are rounded up to metric units. For example,

6586-472: The top. Wangjing Lou ( t 望 京 樓 , s 望 京 楼 , Wàngjīng Lóu ) is one of Jinshanling's 67 watchtowers , 980 m (3,220 ft) above sea level. Southeast of Jinshanling is the Mutianyu Great Wall which winds along lofty, cragged mountains from the southeast to the northwest for 2.25 km (1.40 mi). It is connected with Juyongguan Pass to the west and Gubeikou to

6675-636: The traditional character set used in Taiwan ( TC ) and the set used in Hong Kong ( HK ). Most Chinese-language webpages now use Unicode for their text. The World Wide Web Consortium (W3C) recommends the use of the language tag zh-Hant to specify webpage content written with traditional characters. In the Japanese writing system , kyujitai are traditional forms, which were simplified to create shinjitai for standardized Japanese use following World War II. Kyūjitai are mostly congruent with

6764-985: The traditional characters in Chinese, save for minor stylistic variation. Characters that are not included in the jōyō kanji list are generally recommended to be printed in their traditional forms, with a few exceptions. Additionally, there are kokuji , which are kanji wholly created in Japan, rather than originally being borrowed from China. In the Korean writing system , hanja —replaced almost entirely by hangul in South Korea and totally replaced in North Korea —are mostly identical with their traditional counterparts, save minor stylistic variations. As with Japanese, there are autochthonous hanja, known as gukja . Traditional Chinese characters are also used by non-Chinese ethnic groups. The Maniq people living in Thailand and Malaysia use Chinese characters to write

6853-518: The ubiquitous Unicode standard gives equal weight to simplified and traditional Chinese characters, and has become by far the most popular encoding for Chinese-language text. There are various input method editors (IMEs) available for the input of Chinese characters . Many characters, often dialectical variants, are encoded in Unicode but cannot be inputted using certain IMEs, with one example being

6942-408: The uppermost portion of the vast majority of the wall, with defensive gaps a little over 30 cm (12 in) tall, and about 23 cm (9.1 in) wide. From the parapets, guards could survey the surrounding land. Sticky rice mortar , consisting of sticky rice soup mixed with slaked lime , was extensively used to hold bricks together; no human bones or body parts were ever incorporated into

7031-461: The wall at that time, they were not significant. Soon after Europeans reached Ming China by ship in the early 16th century, accounts of the Great Wall started to circulate in Europe, even though no European was to see it for another century. Possibly one of the earliest European descriptions of the wall and of its significance for the defense of the country against the " Tartars " (i.e. Mongols) may be

7120-788: The wall included "the Purple Frontier" ( 紫 塞 , Zǐsài ) and "the Earth Dragon" ( t 土 龍 , s 土 龙 , Tǔlóng ). Only during the Qing period did "Long Wall" become the catch-all term to refer to the many border walls regardless of their location or dynastic origin, equivalent to the English "Great Wall". Sections of the wall in south Gobi Desert and Mongolian steppe are sometimes referred to as "Wall of Genghis Khan", even though Genghis Khan did not construct any walls or permanent defense lines himself. The current English name evolved from accounts of "the Chinese wall" from early modern European travelers. By

7209-420: The wall to make a shortcut for an excavator to pass through. Police described the act as causing "irreversible damage to the integrity of the Ming Great Wall and to the safety of the cultural relics". Various factoids in popular culture claim that the Great Wall can be seen (with the naked eye) from space, with questionable degrees of veracity. The Great Wall of China cannot be seen by the naked human eye from

7298-500: The wall's inner surface. While portions north of Beijing and near tourist centers have been preserved and even extensively renovated, in many other locations the wall is in disrepair. The wall sometimes provided a source of stones to build houses and roads. Sections of the wall are also prone to graffiti and vandalism , while inscribed bricks were pilfered and sold on the market for up to 50 renminbi . Parts have been destroyed to make way for construction or mining. A 2012 report by

7387-405: The wall, faced sections of the ram-earth wall with bricks and constructed 1,200 watchtowers from Shanhaiguan Pass to Changping to warn of approaching Mongol raiders. During the 1440s–1460s, the Ming also built a so-called "Liaodong Wall". Similar in function to the Great Wall (whose extension, in a sense, it was), but more basic in construction, the Liaodong Wall enclosed the agricultural heartland of

7476-672: The walls and trenches spanning a total length of 21,196.18 km (13,170.70 mi). Incorporating advanced technologies, the study has concluded that the Ming Great Wall measures 8,850 km (5,500 mi). This consists of 6,259 km (3,889 mi) of wall sections, 359 km (223 mi) of trenches and 2,232 km (1,387 mi) of natural defensive barriers such as hills and rivers. In addition, Qin , Han and earlier Great Wall sites are 3,080 km (1,914 mi) long in total; Jin dynasty (1115–1234) border fortifications are 4,010 km (2,492 mi) in length;

7565-504: The word "market" ( 市 , shì ) is used to specify the traditional unit and "common" or "public" ( 公 , gōng ) is used for the metric value. Taiwan , like Korea , saw its traditional units standardized to Japanese values and their conversion to a metric basis, such as the Taiwanese ping of about 3.306   m based on the square ken . The Hong Kong SAR continues to use its traditional units , now legally defined based on

7654-539: The words for simplified and reduced are homophonous in Standard Chinese , both pronounced as jiǎn . The modern shapes of traditional Chinese characters first appeared with the emergence of the clerical script during the Han dynasty c.  200 BCE , with the sets of forms and norms more or less stable since the Southern and Northern dynasties period c.  the 5th century . Although

7743-440: Was a central guiding principle in constructing the wall, implying that the Chinese were not erecting a permanently fixed border. Transporting the large quantity of materials required for construction was difficult, so builders always tried to use local resources. Stones from the mountains were used over mountain ranges, while rammed earth was used for construction in the plains. There are no surviving historical records indicating

7832-634: Was annexed into the empire, so constructions on the Great Wall were discontinued. On the other hand, the so-called Willow Palisade , following a line similar to that of the Ming Liaodong Wall, was constructed by the Qing rulers in Manchuria. Its purpose, however, was not defense but rather to prevent Han Chinese migration into Manchuria. None of the Europeans who visited China or Mongolia in

7921-430: Was stronger and more elaborate due to the use of bricks and stone instead of rammed earth. Up to 25,000 watchtowers are estimated to have been constructed on the wall. As Mongol raids continued periodically over the years, the Ming devoted considerable resources to repair and reinforce the walls. Sections near the Ming capital of Beijing were especially strong. Qi Jiguang between 1567 and 1570 also repaired and reinforced

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