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Longest tunnel on Beijing-Zhangjiakou high-speed rail network achieves new milestone

chinadaily.com.cn | Updated: 2018-11-12 13:46

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The double-track tunnel links Beijing to Zhangjiakou, where most of the Olympics' alpine skiing events will take place.

When the 2022 Winter Olympics starts, it will take passengers only three minutes to cross the 12.974 km tunnel.

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