Question: By bullet train, what is the distance between Shanghai and the Chinese city that the capital was moved to from Nanjing in 1421?

full_context: Document 1: Shanghai–Hangzhou high-speed railway: The Shanghai–Hangzhou high-speed railway (), also known as the Huhang high-speed railway or Huhang passenger railway is a high-speed rail line in China between Shanghai and Hangzhou, Zhejiang. The line is in length and designed for commercial train service at . It was built in 20 months and opened on October 26, 2010. The line shortened travel time between the two cities from 78 to 45 minutes. The line is also used by trains departing Shanghai's terminals for Nanchang, Changsha, Guiyang, and Kunming making it part of the Shanghai–Kunming High-Speed Railway. It has made the proposed Shanghai–Hangzhou Maglev Line unlikely.
Document 2: Beijing–Shanghai high-speed railway: Under former Minister of Railways Liu Zhijun, the railway line was the first one designed for a maximum speed of 380 km / h in commercial operations. The non-stop train from Beijing South to Shanghai Hongqiao was expected to finish the 1,305 kilometres (811 mi) journey in 3 hours and 58 minutes, averaging 329 kilometres per hour (204 mph), making it the fastest scheduled train in the world, compared to 9 hours and 49 minutes on the fastest trains running on the parallel conventional railway. But following Liu Zhijun's dismissal in February 2011, several major changes were announced. First, trains would be slowed to a maximum speed of 300 km / h (186 mph), reducing operating costs. At this speed, the fastest trains would take 4 hours and 48 minutes to travel from Beijing South to Shanghai Hongqiao, making one stop at Nanjing South. Additionally, a slower class of trains running at 250 km / h (155 mph) would be operated, making more stops and charging lower fares. On September 21, 2017, 350 km / h operation was restored with the introduction of China Standardized EMU, reducing travel times between Beijing and Shanghai to about 4 hours 30 minutes on the fastest scheduled trains.
Document 3: Beijing–Shanghai high-speed railway: The Beijing -- Shanghai High - Speed Railway (or Jinghu High - Speed Railway from its Chinese name) is a 1,318 - kilometre (819 mi) long high - speed railway that connects two major economic zones in the People's Republic of China, the Bohai Economic Rim and the Yangtze River Delta. Construction began on April 18, 2008, and a ceremony to mark the completion of track laying was held on November 15, 2010. The line opened to the public for commercial service on June 30, 2011. This rail line is the world's longest high - speed line ever constructed in a single phase. It is China's most profitable high speed rail line, reporting a 6.6 billion yuan net operational profit in 2015.
Document 4: Nanjing: During the period of North–South division, Nanjing remained the capital of the Southern dynasties for more than two and a half centuries. During this time, Nanjing was the international hub of East Asia. Based on historical documents, the city had 280,000 registered households. Assuming an average Nanjing household had about 5.1 people at that time, the city had more than 1.4 million residents.
Document 5: Nanjing: Nanjing is an important railway hub in eastern China. It serves as rail junction for the Beijing-Shanghai (Jinghu) (which is itself composed of the old Jinpu and Huning Railways), Nanjing–Tongling Railway (Ningtong), Nanjing–Qidong (Ningqi), and the Nanjing-Xian (Ningxi) which encompasses the Hefei–Nanjing Railway. Nanjing is connected to the national high-speed railway network by Beijing–Shanghai High-Speed Railway and Shanghai–Wuhan–Chengdu Passenger Dedicated Line, with several more high-speed rail lines under construction.
Document 6: High-speed rail: State planning for high - speed railway began in the early 1990s, and the country's first high - speed rail line, the Qinhuangdao -- Shenyang Passenger Railway, was built in 1999 and opened to commercial operation in 2003. This line could accommodate commercial trains running at up to 200 km / h (120 mph). Planners also considered Germany's Transrapid maglev technology and built the Shanghai Maglev Train, which runs on a 30.5 km (19.0 mi) track linking the city and its international airport. The maglev train service began operating in 2004 with trains reaching a top speed of 431 km / h (268 mph), and remains the fastest high - speed service in the world. Maglev, however, was not adopted nationally and all subsequent expansion features high - speed rail on conventional tracks.
Document 7: Ming dynasty: Great Ming 大明 1368 -- 1644 Ming China under the reign of the Yongle Emperor Ming China around 1580 Capital Nanjing (Yingtian prefecture) (1368 -- 1644) Beijing (Shuntian prefecture) (1403 -- 1644) Languages Official language: Mandarin Other Chinese languages Other languages: Turki (Modern Uyghur), Old Uyghur language, Tibetan, Mongolian, Jurchen, others Religion Heaven worship, Taoism, Confucianism, Buddhism, Chinese folk religion, Islam, Roman Catholicism Government Absolute monarchy Emperor (皇帝) 1368 -- 1398 (first) Hongwu Emperor 1402 -- 1424 Yongle Emperor 1627 -- 1644 (last) Chongzhen Emperor Senior Grand Secretary 1402 -- 1407 Xie Jin 1644 Wei Zaode History Established in Nanjing 23 January 1368 Beijing designated as capital 28 October 1420 Fall of Beijing 25 April 1644 End of the Southern Ming 1683 Area 1415 6,500,000 km (2,500,000 sq mi) Population 1393 est. 65,000,000 1403 est. 66,598,337 1 1500 est. 125,000,000 2 1600 est. 160,000,000 3 Currency Paper money (1368 -- 1450) Bimetallic: copper cashes (文, wén) in strings of coin and paper Silver taels (兩, liǎng) in sycees and by weight Preceded by Succeeded by Yuan dynasty Shun dynasty Southern Ming dynasty Today part of (show) Burma China Laos Russia Vietnam North Korea Remnants of the Ming dynasty ruled southern China until 1662, and Taiwan until 1683 a dynastic period which is known as the Southern Ming. 1The numbers are based on estimates made by CJ Peers in Late Imperial Chinese Armies: 1520 -- 1840 2According to A.G. Frank, ReOrient: global economy in the Asian Age, 1998, p. 109 3According to A. Maddison, The World Economy Volume 1: A Millennial Perspective Volume 2, 2007, p. 238
Document 8: Nanjing: Since the Three Kingdoms period, Nanjing has been an industrial centre for textiles and minting owing to its strategic geographical location and convenient transportation. During the Ming dynasty, Nanjing's industry was further expanded, and the city became one of the most prosperous cities in China and the world. It led in textiles, minting, printing, shipbuilding and many other industries, and was the busiest business center in East Asia. Textiles boomed particularly in Qing dynasty, the industry created around 200 thousand jobs and there were about 50 thousand satin machines in the city in 18th and 19th century.
Document 9: Nanjing: Nanjing, one of the nation's most important cities for over a thousand years, is recognized as one of the Four Great Ancient Capitals of China, and had been the world's largest city aggregately for hundreds of years, enjoyed peace and prosperity and beared wars and disasters. Nanjing served as the capital of Eastern Wu, one of the three major states in the Three Kingdoms period (211-280); the Eastern Jin and each of the Southern Dynasties (Liu Song, Southern Qi, Liang and Chen), which successively ruled southern China from 317-589; the Southern Tang, one of the Ten Kingdoms (937-76); the Ming dynasty when, for the first time, all of China was ruled from the city (1368-1421); and the Republic of China (1927–37, 1945–49) prior to its flight to Taiwan during the Chinese Civil War. The city also served as the seat of the rebel Taiping Heavenly Kingdom (1851–64) and the Japanese puppet regime of Wang Jingwei (1940–45) during the Second Sino-Japanese War, and suffered appalling atrocities in both conflicts, including the Nanjing Massacre. It has been serving as the capital city of Jiangsu province after the China was established, and is still the nominal capital of Republic of China that accommodates many of its important heritage sites, including the Presidential Palace and Sun Yat-sen Mausoleum. Nanjing is famous for human historical landscapes, mountains and waters such as Fuzimiao, Ming Palace, Chaotian Palace, Porcelain Tower, Drum Tower, Stone City, City Wall, Qinhuai River, Xuanwu Lake and Purple Mountain. Key cultural facilities include Nanjing Library, Nanjing Museum and Art Museum.
Document 10: Nanjing: Nanjing ( listen; Chinese: 南京, "Southern Capital") is the city situated in the heartland of lower Yangtze River region in China, which has long been a major centre of culture, education, research, politics, economy, transport networks and tourism. It is the capital city of Jiangsu province of People's Republic of China and the second largest city in East China, with a total population of 8,216,100, and legally the capital of Republic of China which lost the mainland during the civil war. The city whose name means "Southern Capital" has a prominent place in Chinese history and culture, having served as the capitals of various Chinese dynasties, kingdoms and republican governments dating from the 3rd century AD to 1949. Prior to the advent of pinyin romanization, Nanjing's city name was spelled as Nanking or Nankin. Nanjing has a number of other names, and some historical names are now used as names of districts of the city, and among them there is the name Jiangning (江寧), whose former character Jiang (江, River) is the former part of the name Jiangsu and latter character Ning (寧, simplified form 宁, Peace) is the short name of Nanjing. When being the capital of a state, for instance, ROC, Jing (京) is adopted as the abbreviation of Nanjing. Although as a city located in southern part of China becoming Chinese national capital as early as in Jin dynasty, the name Nanjing was designated to the city in Ming dynasty, about a thousand years later. Nanjing is particularly known as Jinling (金陵, literally meaning Gold Mountain) and the old name has been used since the Warring States Period in Zhou Dynasty.
Document 11: Nanjing: As the center of the empire, early-Ming Nanjing had worldwide connections. It was home of the admiral Zheng He, who went to sail the Pacific and Indian Oceans, and it was visited by foreign dignitaries, such as a king from Borneo (Boni 渤泥), who died during his visit to China in 1408. The Tomb of the King of Boni, with a spirit way and a tortoise stele, was discovered in Yuhuatai District (south of the walled city) in 1958, and has been restored.
Document 12: Nanjing: It is believed that Nanjing was the largest city in the world from 1358 to 1425 with a population of 487,000 in 1400. Nanjing remained the capital of the Ming Empire until 1421, when the third emperor of the Ming dynasty, the Yongle Emperor, relocated the capital to Beijing.
Document 13: Nanjing: Among all 17 railway stations in Nanjing, passenger rail service is mainly provided by Nanjing Railway Station and Nanjing South Railway Station, while other stations like Nanjing West Railway Station, Zhonghuamen Railway Station and Xianlin Railway Station serve minor roles. Nanjing Railway Station was first built in 1968. In 1999, On November 12, 1999, the station was burnt in a serious fire. Reconstruction of the station was finished on September 1, 2005. Nanjing South Railway Station, which is one of the 5 hub stations on Beijing–Shanghai High-Speed Railway, has officially been claimed as the largest railway station in Asia and the second largest in the world in terms of GFA (Gross Floor Area). Construction of Nanjing South Station began on 10 January 2008. The station was opened for public service in 2011.
Document 14: Nanjing: Being one of the four ancient capitals of China, Nanjing has always been a cultural centre attracting intellectuals from all over the country. In the Tang and Song dynasties, Nanjing was a place where poets gathered and composed poems reminiscent of its luxurious past; during the Ming and Qing dynasties, the city was the official imperial examination centre (Jiangnan Examination Hall) for the Jiangnan region, again acting as a hub where different thoughts and opinions converged and thrived.
Document 15: Zhejiang: Ningbo, Wenzhou, Taizhou and Zhoushan are important commercial ports. The Hangzhou Bay Bridge between Haiyan County and Cixi, is the longest bridge over a continuous body of sea water in the world.
ground_truth: 1,318 - kilometre
sub_queries: Where was the capital moved to? Answer: Beijing
distance between shanghai and Beijing by bullet train Answer: 1,318 - kilometre