Mega machine achieves key Yangtze underwater tunnel breakthrough
- Posted on July 30, 2026
- By The China Daily
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- 1 min read
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Mega machine achieves key Yangtze underwater tunnel breakthrough
A giant shield tunneling machine developed by China for high-speed railway projects completed on Thursday the underwater section of a tunnel traversing the Yangtze River — a breakthrough that will allow trains to run beneath the river at a top speed of 350 kilometers per hour without slowing down.
