Ningbo opens China's first cross-sea urban rail bridge

Overview

Updated Sep 25

On September 22, a train crossed the East China Sea on a new cable-stayed bridge in Ningbo, a port city south of Shanghai. The bridge anchors a 61.45 km urban railway that links the city center with Xiangshan, a peninsula county to the south.

It's the first cross-sea bridge built for an urban railway in China and the world's largest ballastless-track cable-stayed rail bridge. The fastest trip from Ningbo's core to Xiangshan now takes about half an hour at 160 km/h, pulling the county into the city's commuting circle for the first time and easing pressure on the parallel Yongguan Expressway.

Why it matters

The rail link pulls a once-isolated coastal county into a half-hour commuting circle, reshaping where people live, work, and vacation along Ningbo's coast.

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Key Indicators

61.45 km

Line length

The Ningbo-Xiangshan line has 10 stations, two underground and eight elevated.

160 km/h

Maximum train speed

The fastest Ningbo-to-Xiangshan trip is about 30 minutes.

8.276 km

Cross-sea bridge length

The bridge's main span is 688 m; its sea-crossing section runs 6.2 km.

360 km

Total metro network mileage

Up from 297 km, the line extends the network to Xiangshan for the first time.

26.76B yuan

Total project investment

Official investment figure for the whole line, roughly $3.8 billion.

Voices

Curated perspectives — historical figures and your fellow readers.

People Involved

Zhang Chuanbo

Construction project manager, CREC4

Overseen track laying on the cross-sea bridge

Sun Yinghua

Lead designer, China Railway Siyuan

Led overall design of the Ningbo-Xiangshan line

Zhang Honghui

Deputy director, Ningbo Marine Economy Development Bureau

Pushing the line as a driver of coastal economic integration

Organizations Involved

Ningbo Rail Transit Group Co Ltd

State-owned rail operator

Owner and operator of the new line

Runs the Ningbo metro network, now about 360 km across ten or more lines.

China Railway No 4 Engineering Group (CREC4)

State construction firm

Built and laid tracks on the cross-sea bridge

A major subsidiary of China Railway Group, responsible for the bridge's track work and main line sections.

Timeline

February 2023 September 2026

3 events Latest: September 22nd, 2026 · 2 months ago

September 2026
Ningbo-Xiangshan line opens to passengers
Latest Launch

First train departs Xiaoyangjiang Station; Xiangshan gets its first rail link to the city center.
September 22nd, 2026 • 10:30 AM
October 2025
Track laying starts on the bridge
Construction

CREC4 begins laying ballastless track on the cable-stayed bridge, the project's riskiest segment.
October 6th, 2025
February 2023
Construction begins on Xiangshan Port bridge
Construction

Work starts on the 8.276 km cross-sea bridge, the line's control project, in the East China Sea.
February 2023

Scenarios

Ningbo opens Line 10 by year-end, extending the network

Likely Resolves by End of 2026

Discussed by: cnnb.com.cn, the Ningbo municipal news outlet, reported Line 10 is racing toward completion within 2026

Ningbo Rail Transit has said Line 10, connecting the urban districts with Cixi, is on track to open before year-end. If it does, the network expands past 360 km and the cross-sea line becomes part of a larger regional grid rather than a single coastal spur.

Cross-sea bridge clears first typhoon season without extended closure

Deadline passed (Oct 31, 2026)

Discussed by: Engineers at CREC4 and China Railway Siyuan designed the bridge for 46.5 m/s design wind speeds

The bridge sits in an area that takes strong typhoons each summer and fall. Builders ran more than 20 wind tunnel tests and installed a 3-meter diversion barrier plus 78 dampers to suppress vortex vibration. The tail of this year's typhoon season is the first live test of those systems.

Xiangshan tourism revenue rises double digits in first full year

Possible Resolves by Sep 22, 2027

Discussed by: Ningbo Marine Economy Development Bureau deputy director Zhang Honghui cited tourism and industry links as the line's main payoff

Officials expect rail access to boost Xiangshan's beaches, fishing ports, and film studios. The county already extended its autumn fishing festival from a short event to an August-to-October season. First-year visitor and revenue data will show whether the connection converts curiosity into lasting traffic.

Historical Context

3 moments from history that rhyme with this story — and how they unfolded.

May 2008

Hangzhou Bay Bridge (2008)

A 35.7 km highway bridge opened across Hangzhou Bay, the water between Ningbo and Shanghai. It cut the road trip between the two cities from about four hours to roughly two and was the world's longest sea crossing at the time.

Then

It redirected traffic and sparked development in Jiaxing and Cixi, towns along the crossing.

Now

It became the template for Chinese sea-crossing infrastructure that later provinces copied.

Why this matters now

Built in the same region and for the same reason, Ningbo's new bridge extends the logic one step: moving commuters by rail, not just cars, across the bay.

2000

Oresund Bridge (2000)

A 7.8 km combined road-and-rail link between Copenhagen and Malmo opened in July 2000. Trains cross in about 35 minutes and run every 20 minutes.

Then

It merged two cities into a single labor market, the Oresund Region.

Now

Rail carries most cross-link travelers, making it the leading example of cross-sea rail commuting.

Why this matters now

It is the clearest precedent for what Ningbo wants: a cross-sea rail link that turns a separate county into a functional suburb.

October 2018

Hong Kong-Zhuhai-Macau Bridge (2018)

A 55 km sea crossing, the world's longest, opened after nine years of construction. It linked Hong Kong, Zhuhai, and Macau by road for the first time.

Then

It cut road travel from Hong Kong to Zhuhai from about four hours to under one.

Now

Traffic took years to reach forecasts, a reminder that mega sea crossings often fill slowly.

Why this matters now

A caution for expectations of instant ridership on the Ningbo-Xiangshan line.