15.57 km tunnel for trains up to speed 350 kilometer hour.
" A milestone in the construction of the country's longest urban high-speed railway tunnel, said China Railway's 14th Bureau Group, which is building the tunnel."
English:
https://www.chinadaily.com.cn/a/202404/19/WS6621cfd2a31082fc043c2dce.html
cover tunnel photo by: Matt Brown from London, England / CC BY
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