Machines trained in complex mountain data carefully navigate fault lines, fractures, caves and sinkholes to pick the best excavation method.

In Wufeng Tujia autonomous county, Hubei province, the rugged beauty of central China masks the region’s long-standing isolation. Its steep terrain and dense forests have long hindered transport, stifling growth and keeping communities cut off both physically and economically. But a new force is now reshaping the landscape – with dynamite, drilling rigs and lines of code. The Yangcun Tunnel in Wufeng is part of a high-speed rail line designed to bring 350km/h (217mph) trains into one of China’s…

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