China Opens First Cross-Sea Suburban Railway

The first cross-sea suburban railway in China entered commercial operation on Tuesday, connecting the central urban area of Ningbo with the Xiangshan Peninsula across Xiangshan Port. The Ningbo-Xiangshan Suburban Railway, known as the Ningxiang Line and branded publicly as Ningbo Metro Line 12, began service on 22 September, according to Xinhua News. The opening ends the Xiangshan Peninsula’s history of having no rail transit and creates a half-hour commuting circle between Ningbo and Xiangshan.

A 61-Kilometre Corridor Across the Water

The line runs 61.45 kilometres from Xiaoyangjiang Station in Ningbo’s Yinzhou District in the north to Damuwan Station in Xiangshan County in the south. It comprises 10 stations — two underground and eight elevated — served by four-car Type A suburban trains with a maximum operating speed of 160 km/h. A single one-way trip takes about 35 minutes, with the journey between the main city and Xiangshan completing in roughly half an hour.

The route passes through Yunlong, Hengxi, Tangxi and Xianxiang before crossing Xiangshan Port, then continues via Xianxiang on the Xiangshan side and Daxu into the county town. Xiaoyangjiang Station connects with Ningbo Metro Lines 4 and 7. Hengxi Station is reserved for future access toward western Ningbo, and Xianxiang Station is reserved for a future Meishan branch line, as detailed in planning documents reported by Zhejiang Online.

The opening marks the Xiangshan Peninsula’s formal entry into the regional rail network. According to Xinhua, trains crossing the Xiangshan Port bridge “open a rapid commuting corridor between Ningbo’s central urban area and the Xiangshan Peninsula,” injecting new momentum into the coordinated development of the southern part of the Ningbo metropolitan area.

The Xiangshan Port Cross-Sea Bridge

The line’s controlling and landmark project is the Xiangshan Port Cross-Sea Bridge, roughly 8.276 kilometres long with some 6.24 kilometres spanning open water. The structure is described by Zhejiang Online as the world’s largest-span ballastless-track railway cable-stayed bridge and the longest-span bridge in China built immediately adjacent to an existing structure. It runs parallel to the existing Yong-Dong Expressway bridge at a separation of only 50 metres, forming a distinctive dual sea-crossing corridor.

The engineering challenges were considerable. “The maximum design reference wind speed reaches 46.5 metres per second, the highest in the country; the clear distance between the new and old bridge decks is only 50 metres, with significant aerodynamic interference,” said Lu Zhongda, head of the bridge’s technical expert group, in the same Zhejiang Online report. He added that the design anti-ship-collision level is 50,000-tonne class and that the new and old piers stand only 16.05 metres apart, making a parallel-bridge anti-collision system difficult to engineer. In response, the project developed a beam structure combining aerodynamic optimisation with a built-in damping system and a twin-pier linked anti-collision system, which reports described as a world first.

Construction of the bridge began in February 2023 and involved more than 1,000 days of continuous work with over 8,000 person-times invested. The final steel box girder was hoisted into place on 29 December 2025, after which work shifted to the bridge deck, ancillary works, pipeline laying and equipment installation.

Trial Runs and Public Response

Before the official opening, free trial rides began on 14 September 2026 and drew large crowds, with the line informally dubbed China’s first “sea-view metro” by local media. Xinhua reported the opening at 10:32 local time, and the item was carried by China News and China Economic Net shortly afterwards. The opening-day reports are based on the same Xinhua wire dispatch.

A Burgeoning Suburban Railway Network

The Ningxiang Line joins a broader build-out of suburban rail across China’s Yangtze River Delta, the country’s densest such construction region. Several lines reached a concentrated commissioning window in 2026, according to a China Business Journal survey of the sector’s expansion. In April, the Nanjing-Ma’anshan Line — described as China’s first cross-province jointly built suburban railway, at about 54.23 kilometres — established 30-minute connectivity between the two city centres. The Hangzhou-Deqing Suburban Railway, which began construction in January 2022, had its main track fully connected and was targeted for year-end 2026 commissioning. Beijing, meanwhile, is pushing roughly 90.5 kilometres of suburban rail, including the City Sub-Center Line, toward initial operation by the end of the year.

Experts view suburban rail as an area where China lags behind its fast-developing trunk railways and urban metro systems. Huang Min, head of the China Local Railway Association, has described suburban rail in that report as a shortfall that needs urgent filling, citing rising commuting and tourism demand within city clusters and metropolitan areas. A recurring obstacle cited in the same industry discussion is that cross-system and cross-region security checks are not mutually recognised, which hampers seamless interchange between suburban rail, intercity rail and urban metro.

What to Watch

The Ningxiang Line demonstrates how dedicated suburban railways can bring isolated peninsulas and satellite counties into a metropolitan commuting shed, and it provides a reference case for the technically demanding practice of building new rail bridges alongside existing ones. As more Yangtze River Delta lines approach completion and operators confront the interoperability and ticketing hurdles that remain, the coming year will show whether China’s suburban rail can match the pace of its mainline and metro building — and whether the half-hour circle created here becomes the template rather than the exception.