Question: How long does the high speed train take to travel from Shanghai to the city where the capital was moved to?

full_context: Document 1: 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 2: 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 Based on historical documents, the city had 280,000 registered households.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 3: 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 4: 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 5: 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 6: 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 7: 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 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: Express trains in India: The Duronto Express trains introduced in 2009 (which run between major cities without any intermediate halts) are projected to be the fastest trains in India when new services are introduced with a higher speed limit of 120 - 130 km / h. Despite being limited to a lower speed limit, they take as much time as a Rajdhani or Shatabdi on the same route, courtesy the non-stop nature of their journey. Rajdhani Express which was introduced in 1969 to connect New Delhi with the state capitals in India, travels at speeds up to 130 km / h.
Document 10: High-speed rail in India: India does not have any railways that can be classified as high - speed rail (HSR) by international standards, i.e. railways with operational speeds exceeding 200 km / h (120 mph). The current fastest train in India is the Gatimaan Express with a top speed of 160 km / h (99 mph), which only runs between Delhi and Jhansi.
Document 11: 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 12: 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 13: Channel Tunnel: The Channel Tunnel Rail Link (CTRL), now called High Speed 1, runs 69 miles (111 km) from St Pancras railway station in London to the tunnel portal at Folkestone in Kent. It cost £5.8 billion. On 16 September 2003 the prime minister, Tony Blair, opened the first section of High Speed 1, from Folkestone to north Kent. On 6 November 2007 the Queen officially opened High Speed 1 and St Pancras International station, replacing the original slower link to Waterloo International railway station. High Speed 1 trains travel at up to 300 km / h (186 mph), the journey from London to Paris taking 2 hours 15 minutes, to Brussels 1 hour 51 minutes.
Document 14: 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 15: Eurostar: The service is operated by eighteen - car Class 373 / 1 trains and sixteen - car Class 374 trains which run at up to 300 kilometres per hour (186 mph) on a network of high - speed lines. The LGV Nord line in France opened before Eurostar services began in 1994, and newer lines enabling faster journeys were added later -- HSL 1 in Belgium and High Speed 1 in southern England. The French and Belgian parts of the network are shared with Paris -- Brussels Thalys services and also with TGV trains. In the United Kingdom the two - stage Channel Tunnel Rail Link project was completed on 14 November 2007 and renamed High Speed 1, when the London terminus of Eurostar transferred from Waterloo International to St Pancras International.
ground_truth: 4 hours 30 minutes on the fastest scheduled trains
sub_queries: Where was the capital moved to? Answer: Beijing
how long does the high speed train take from shanghai to Beijing Answer: 4 hours 30 minutes on the fastest scheduled trains