World's longest tunnel costing £20bn set to cut eight-hour journey down to 40 minutes
- Posted on April 30, 2026
- By The Mirror
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- 1 min read
World's longest tunnel costing £20bn set to cut eight-hour journey down to 40 minutes
A giant undersea tunnel extending for 76 miles through one of the world's most earthquake-prone regions has been green-lit by the Chinese government
