High-speed rail in China

China's high-speed rail network is the world's largest, spanning over 40,000 kilometers of dedicated lines by the end of 2023, with plans to expand to 70,000 kilometers by 2035.¹ The network is operated by China State Railway Group (China Railway), a state-owned enterprise, and uses standard gauge track with electrification. Trains run at speeds up to 350 km/h on many corridors, such as the Beijing–Shanghai line, which is among the world's busiest high-speed routes.² The system integrates with conventional rail, metro, and airport networks, offering seamless connectivity. High-speed services are categorized into 'G' (high-speed), 'D' (electric multiple unit), and 'C' (intercity) trains, with varying speeds and pricing.

The modern high-speed era began in 2008 with the opening of the Beijing–Tianjin intercity line, built for the Olympics, but the foundation was laid earlier with the 1997–2007 railway speed-up campaigns that raised conventional train speeds.³ The 2004 Medium- and Long-Term Railway Network Plan set the goal of a national HSR grid, and subsequent plans expanded it. Key milestones include the Wuhan–Guangzhou line (2009), the Beijing–Shanghai line (2011), and the opening of the world's longest high-speed line, the Beijing–Guangzhou–Shenzhen–Hong Kong corridor (2012). The network has been built rapidly, often using indigenous technology developed from imported platforms, and has become a symbol of national pride.

China has developed its own high-speed train families, including the CRH (China Railway High-speed) series and the newer Fuxing (Rejuvenation) series, which are designed and manufactured domestically.⁴ The Fuxing trains, introduced in 2017, feature a top speed of 400 km/h in design and incorporate advanced aerodynamics, lightweight materials, and intelligent control systems. China also leads in high-speed rail signaling with the Chinese Train Control System (CTCS), which enables high-frequency operations. The country is testing even faster technologies, including maglev trains, with a 600 km/h prototype unveiled in 2021.⁵ These innovations have made China a major exporter of HSR technology, with projects in Indonesia, Thailand, and other countries.

The HSR network has transformed China's economy by reducing travel times, boosting tourism, and enabling the growth of 'one-hour' and 'half-day' economic circles around major cities.⁶ It has also contributed to regional development, linking less-developed western regions to coastal hubs. However, the network has faced challenges, including high construction costs and debt, though ridership has grown steadily, making many lines profitable. Socially, HSR has changed commuting patterns, with some workers living in one city and working in another. The network also plays a role in national strategy, such as the Belt and Road Initiative, where it serves as a flagship export.

Beyond the headline facts, several niche aspects are notable. The Beijing–Shanghai line uses a 'vertical alignment' that minimizes land use, and some sections are elevated to reduce noise. The network includes the world's first high-speed rail station built inside an airport terminal, at Shanghai Hongqiao. China has also built high-speed lines in extreme environments, such as the Lanzhou–Xinjiang line, which crosses the Gobi Desert and requires special measures against sand and temperature extremes.⁷ The CRH380A train set a world speed record of 486.1 km/h during a test in 2010, though it was not a commercial service. Additionally, the network has a dedicated 'high-speed rail police' unit, and some stations are equipped with facial recognition for security.

CRH

China Railway High-speed, a series of high-speed trains developed in China.

Fuxing

The 'Rejuvenation' series of Chinese standard high-speed trains, introduced in 2017.

CTCS

Chinese Train Control System, the signaling system used on Chinese high-speed lines.

Maglev

Magnetic levitation, a technology that uses magnetic fields to propel trains without wheels.