Shanghai Tunnel Engineering Co (STEC) build Shanghai's airport line. Line has a total length of 68.6 kilometers, with 56.7 kilometers underground (tunnel).
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cover tunnel photo by: Matt Brown from London, England / CC BY
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https://www.shine.cn/news/metro/2109265626/
Work progresses on Shanghai's airport line
www.shine.cnConstruction is underway on the city's airport line which links the city's two international airport