China-Laos railway tunnels' construction has made a decisive breakthrough, with its longest tunnel 9,384-meter-long Ban Sen No.2 Tunnel, south to the ancient Lao capital of Luang Prabang, drilled through on Friday morning in the tropical mountains of northern Laos.
http://www.xinhuanet.com/english/2019-12/27/c_138661119.htm
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cover tunnel photo by: Matt Brown from London, England / CC BY
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