The history that took sixty years to start China’s first urban rail line was not a triumph of engineering. It was a defence project. Planning for a Beijing subway began in 1953, with Soviet advisors brought in to design a system modelled on the Moscow Metro. The original Soviet plan called for exceptionally deep tunnels, more than one hundred metres down, that could double as civil defence shelters in a war. Beijing’s geology, and the withdrawal of Soviet technicians in 1960, forced a redesign to cut and cover construction at depths of ten to twenty metres.
Chairman Mao Zedong personally approved the project on 4 February 1965. Construction began on 1 July 1965, with a ceremony attended by Zhu De, Deng Xiaoping, and the mayor Peng Zhen. The first section opened on 1 October 1969 to mark the twentieth anniversary of the founding of the People’s Republic, running 21 kilometres from Fushouling in the Western Hills to the Beijing Railway Station with sixteen stations. It was not a public railway. An electrical fire in November 1969 killed three people and led to the line being placed under PLA control. From 1971 until 1975 the line was shut for 399 days for political reasons during the Cultural Revolution. Trial public operation began on 15 January 1971, but passengers still needed a credential letter from their work unit to buy a ticket. The fare was 0.10 yuan. Full public access came on 15 September 1981, when the initial line reopened as a proper 27.6 kilometre, nineteen station metro.
For the next decade nothing much happened. Tianjin opened the second mainland metro in 1984. Shanghai opened the first section of what would become its metro on 28 May 1993, with a 16.1 kilometre segment from Xujiahui to the Shanghai Railway Station following on 10 April 1995. Guangzhou opened in 1997. By 1995, however, the State Council had halted most new metro construction outside the three existing cities. The reasons were practical: low ridership, high cost, and rising municipal debt.
The bottleneck was unclogged in May 1999 with a single condition. New metro systems had to source at least sixty per cent of their equipment domestically. This was the seed from which CRRC, the merged rolling stock maker, and the wider Chinese rail equipment industry grew. It was also the moment when municipal governments across the country began filing metro plans again.
The 2003 threshold that decided which cities could build
The flood of applications in the late 1990s prompted the State Council to issue a formal gating rule in 2003. Document 81 of that year, known in Chinese policy circles simply as the “81 number document”, set numerical thresholds that any city had to meet before it could begin a metro project. The thresholds were:
– urban district population of three million or more,
– local fiscal revenue of ten billion yuan or more in the most recent year,
– GDP of one hundred billion yuan or more,
– forecast peak one way passenger flow of thirty thousand per hour on the proposed line,
– forecast initial passenger intensity of seven thousand trips per day per kilometre.
The same document set parallel thresholds for light rail, which were lower on each criterion. Light rail cities needed 1.5 million urban residents, 60 billion yuan in GDP, and 6 billion yuan in fiscal revenue, with peak flows of 10,000 per hour.
Document 81 also set the approval cascade. Cities did not get to decide for themselves. They had to file a rail network plan that sat underneath an urban comprehensive transport plan, which in turn sat underneath the city’s master plan. The rail network plan went to the National Development and Reform Commission, which checked it against the thresholds, and then to the State Council for ratification. The same document required project sponsors to fund at least 40 per cent of construction from their own budgets. Anything less than that, and the project was meant to be refused.
For the first decade after 2003 the thresholds were easy to clear. China’s growth lifted dozens of cities above the 10 billion yuan fiscal revenue line. The number of cities operating urban rail grew from four in 2002 (Beijing, Tianjin, Shanghai, Guangzhou) to more than twenty by 2015. The pace was not uniform. The Beijing Olympics in 2008 unlocked spending on the Beijing system; Guangzhou’s expansion followed the Asian Games in 2010; the Shanghai Expo in 2010 did the same for the eastern seaboard. Once the threshold was cleared and the budget was signed, the construction followed quickly. Chinese metro projects typically take five to seven years from approval to first opening.
By the late 2010s it was clear that the original thresholds were too loose. Cities with healthy fiscal balances on paper but weak ridership had been approved. Several second tier systems were running at low intensity. In July 2018 the State Council updated the rules. The new document, often called Document 52 of 2018, raised the GDP threshold for metro cities from 100 billion to 300 billion yuan and the fiscal revenue threshold from 10 billion to 30 billion yuan. The population threshold stayed at 3 million for metros and 1.5 million for light rail, but the new document tightened the initial intensity requirement, demanding at least 7,000 trips per day per kilometre at opening, with a clear path to 30,000 per hour at peak. Anything below that, and the project would not pass.
The practical effect was a hard ceiling on fourth tier cities. Several provincial capitals in the central and western interior that had been planning metros found their applications quietly shelved or downgraded to tram or bus rapid transit systems. The 54 cities that operate urban rail today are almost all provincial capitals or cities with populations in the multi-million range.
What the networks actually look like
The headline figure, 54 cities and 10,945.6 kilometres of track at the end of 2024, hides a lot of variation. There are three broad groups.
The first group is the megacity tier. Five cities operate networks longer than five hundred kilometres. Beijing runs 30 lines and 541 stations across 909 kilometres of route, including two airport rail links and one maglev. It overtook Shanghai in late 2023 to become the longest metro system in the world by route length. Shanghai follows at 816 kilometres across 19 lines. Guangzhou is third at 779.9 kilometres across 19 lines, including the Guangfo intercity link into Foshan. Chengdu operates 15 lines plus one tram at 716.37 kilometres. Shenzhen runs 17 lines at 595.1 kilometres.
These five cities also dominate ridership. Beijing and Shanghai each carry close to four billion passenger trips per year, far ahead of any other city on Earth. Guangzhou carries about 3.3 billion. Chengdu carries about 2.2 billion. Shenzhen is at the lower end of this tier but still carries well over a billion a year. Together these five cities account for more than half of all urban rail trips in China.
The second group is the provincial capital tier. Twenty more cities operate metros of between one hundred and five hundred kilometres, including Wuhan, Xi’an, Nanjing, Hangzhou, Chongqing, Tianjin, Suzhou, Qingdao, Dalian, Zhengzhou, Changsha, Shenyang, and others. Most opened between 2010 and 2020. Hangzhou’s 13 lines and 516 kilometres put it close to the megacity tier; Chongqing runs a mix of conventional metro, monorail, and a straddle beam system that crosses the Yangtze and Jialing rivers.
The third group is the smaller tier. Roughly twenty cities operate shorter networks, often a single line plus extensions, with lengths below one hundred kilometres. Many of these systems mix conventional metro with monorail, maglev, automated people movers, or trams. The diversity of mode in this tier is striking. Chongqing runs the busiest monorail line in the world; Changsha runs a magnetic levitation airport link; Guangzhou operates the Zhujiang New Town automated people mover; Beijing, Tianjin and several other cities operate modern trams on segregated rights of way.
Across all 54 cities the breakdown at the end of 2024 was 43 cities with conventional metro or light rail lines, 16 cities with monorail, maglev, or regional rapid transit, and 18 cities with trams or automated guideway transit. Many cities fall into more than one bucket. Forty three cities with 267 lines at 9,477 kilometres of metro and light rail dominate the kilometrage, while the monorail and regional tier adds another 970 kilometres and the tram and automated guideway tier adds another 497 kilometres.
The mechanism behind the build rate
The construction industry that turned the threshold rules into physical track was unusual. Two features matter.
The first is ownership. Almost every metro system in China is owned and operated by a city level company, usually a municipal metro group set up specifically for the purpose. Beijing Metro Group operates Beijing. Shanghai Shentong Metro operates Shanghai. Guangzhou Metro Group operates Guangzhou. These are state owned enterprises, not private operators. They issue bonds, take on debt, and run the systems, but the city government is the ultimate owner and backstop.
The second feature is the domestic equipment industry. The 1999 sixty per cent domestic content rule was enforced. Chinese rolling stock makers grew quickly to meet demand. By the 2010s, CRRC, formed by the merger of CNR and CSR in 2015, was the world’s largest rolling stock maker, supplying not just Chinese metros but metro fleets in Singapore, Boston, Chicago, and several European cities. The Chinese signalling industry, led by CASCO and CRSC, also grew up alongside the metros. The result was that the per kilometre cost of building a Chinese metro fell well below the cost of comparable systems in Europe or North America. Estimates put it at roughly half to two thirds of the cost in mature Western markets, although direct comparisons are complicated by differences in scope and station design.
The financing side was equally distinctive. Construction was funded out of three pools: city general budget money, policy bank loans (China Development Bank and Agricultural Development Bank in particular), and the proceeds of municipal bonds issued by the metro groups themselves. The 2003 Document 81 required that at least 40 per cent of project capital come from the city’s own budget. That figure was widely interpreted as a minimum, and many cities put in more than half. The remainder was financed by borrowing against future fare revenue, advertising, and station retail. None of this made the projects cheap. It made them bankable.
The combination of city level ownership, policy bank lending, and domestic supply chains allowed the system to build at a pace that surprised everyone. Between 2010 and 2020 China added more new metro track than the rest of the world had built in the previous fifty years.
Where the policy is going next
Three trends are visible in the most recent data. The first is automation. By the end of 2024, twenty three Chinese cities had opened fully automated metro lines, with fifty four such lines totalling 1,486 kilometres of track. That is 12.21 per cent of the country’s urban rail network running without drivers, on GoA4 grade of automation. Beijing, Shanghai, Guangzhou and Shenzhen run several of these. The technology is mature enough that every new metro line approved from 2020 onwards has been designed for full automation from the start, even if some are still operated with attendants.
The second trend is regional rail. The 14th Five Year Plan, running from 2021 to 2025, pushed for “suburban rail” or “市域快轨” lines that connect city centres with surrounding county level cities at higher speeds than conventional metro. Beijing, Shanghai, Chengdu, and several others run these lines now. They are typically 100 to 160 kilometres per hour, sit on their own tracks, and use metro style rolling stock. The point is to extend the daily commute catchment beyond the traditional municipal boundary.
The third trend is a hard ceiling on new starts. Since the 2018 threshold tightening, no new metro system has been approved in a fourth tier city. Applications from Wenzhou, Yinchuan, and several others have been quietly deferred. The 14th Five Year Plan target is to keep total urban rail length at around 13,200 kilometres by 2025, which is a more modest pace than the 2015 to 2020 boom. The central government is balancing the policy goal of building complete urban rail coverage in major cities against the fiscal goal of not creating a fresh wave of unviable systems.
What December 2024 looked like up close
The 2024 calendar year was a representative one. December alone saw twelve new line openings across the network. Beijing opened Line 3 Phase I and Line 12, two new east west trunks through the centre of the city. Guangzhou opened Line 11, a circumferential that connects the city’s southern suburbs. Chengdu opened Line 27 Phase I. Shenzhen opened Line 13 Phase I, taking the city’s total route length above 595 kilometres. Xi’an opened the first ring line. Suzhou opened Line 7. Zhengzhou opened Lines 7 and 8 Phase I. Shenyang opened Line 3 Phase I. Hefei opened Line 8 Phase I. Guiyang opened the suburban Line S1. Several existing lines were extended at the same time. In one month the network added 423.5 kilometres of operational track. That is roughly the entire metro system of a mid sized European city, opened in thirty days.
The pace matters because it shows what the regulatory and industrial mechanism is actually capable of, when the policy mix lines up. Approval by the central government, capital from the city budget, debt from policy banks, rolling stock and signalling from domestic suppliers, construction by Chinese civil engineering groups, operation by a city owned metro company. Every link in the chain is domestic. Every link in the chain is on call. That is what enables a dozen new lines in a single month.
Honest framing
There are several things the headline figure hides.
The first is concentration. The top five metros carry more than half of all trips. The next twenty carry most of the rest. The smallest twenty systems are carrying comparatively little. Several of the smallest tier systems run at intensities well below the 7,000 trips per day per kilometre the 2018 rules require, which means they would not be approved today even though they exist.
The second is debt. City level metro groups have accumulated significant debt to build these systems. The Ministry of Finance has flagged metro debt as a fiscal risk. Some cities have transferred metro operations back to general budget support, effectively socialising the losses. The 2018 threshold tightening is partly a response to this fiscal exposure.
The third is the gap between policy intent and reality. The threshold rules say that a city must have forecast peak one way flows of 30,000 per hour. Several systems opened with actual flows below half that. The rules also say initial intensity must reach 7,000 trips per day per kilometre; some of the smaller tier systems have not reached this and are running below break even.
The fourth is the distinction between urban rail and metro in the strict sense. If you include every modern tram on segregated track and every automated guideway system, the count rises to 58 cities and 12,168 kilometres of track, per the Chinese Society for Urban Studies yearbook. The headline 54 is the broader urban rail transit figure used by the Ministry of Transport. The number on the tin is real, but it is one definition among several.
What fifty four cities looks like in one sentence
The fifty four Chinese cities with metro systems today are the visible output of a regulatory mechanism that has been working for two decades: a numerical threshold gate in 2003, a tripling of that gate in 2018, a domestic equipment industry that met the threshold’s price, and a city ownership model that absorbed the debt. The numbers are the consequence. The mechanism is the story.
It is not the only story. Hong Kong’s MTR opened in 1979, before any of the mainland systems except Beijing’s PLA era trial. The Hong Kong network remains one of the most profitable metros in the world because it was run as a property company, not just a transit operator. The mainland systems do not follow that model. They are public utilities, run as public utilities, with the same advantages and limitations that implies.
Nor is the mainland network finished. The 14th Five Year Plan period ends in 2025 with around 13,200 kilometres of track in operation across perhaps fifty seven cities. The 15th Five Year Plan, beginning in 2026, will see the gap between megacity networks and provincial capital networks widen, the gap between provincial capitals and smaller cities narrow, and the automation of new lines become routine rather than notable. The threshold rules that decided which cities could build metros in the first place will continue to decide who gets to add new lines, and who quietly drops back to bus rapid transit and trams.
The fifty four cities that run metros today are not the end state. They are a snapshot of a mechanism that is still running.
Cities and towns with metro systems in China
Strictly defined metros in mainland China: forty five cities across three tiers, plus two Special Administrative Region systems. The Ministry of Transport figure of fifty four includes cities that operate only monorails, maglevs, trams or automated guideways without a conventional metro; the principal tram and light rail only towns are listed at the end of this section.
Megacity tier (more than five hundred kilometres of route each): Beijing, Shanghai, Guangzhou, Chengdu, Shenzhen.
Provincial capital and large city tier: Wuhan, Hangzhou, Xi’an, Nanjing, Chongqing, Tianjin, Suzhou, Qingdao, Dalian, Zhengzhou, Changsha, Shenyang, Kunming, Harbin, Nanchang, Fuzhou, Hefei, Nanning, Guiyang, Xiamen, Shijiazhuang, Ürümqi, Lanzhou, Hohhot.
Smaller tier systems under one hundred kilometres: Foshan, Ningbo, Wuxi, Changchun, Jinan, Dongguan, Xuzhou, Changzhou, Wenzhou, Jinhua, Shaoxing, Taizhou, Nantong, Luoyang, Taiyuan, Wuhu.
Tram and light rail only towns, often classified as counties or county level cities, that the Ministry of Transport counts within urban rail transit: Huai’an, Jiaxing, Sanya, Tianshui, Zhangjiakou, Nanping (Wuyi New Area), Mengzi (Honghe), Qiubei (Wenshan), Huangshi.
Hong Kong and Macau are not part of the fifty four city mainland figure and are reported separately: Hong Kong (Mass Transit Railway), Macau (Macau Light Rapid Transit).