Automation insulates work on Qinghai-Xizang Railway

The opening of the New Guanjiao Tunnel in 2014 changed both the railway and the lives of those who maintained it. As the world's longest dual-line high-altitude railway tunnel, the 32.69-kilometer structure cut transit times through the treacherous mountain pass from two hours to just 20 minutes. For Gu, the journey home shrank to a manageable three and a half hours.

The influx of modern engineering did not eliminate the inherent hardships of the plateau — rather, it systematically changed how those hardships are managed.

According to China State Railway Group, at high-altitude signal and maintenance sites, workers today have better oxygen supplies, water systems, sewage treatment, internet access and recreation facilities. More importantly, technology has reduced the need for workers to spend long periods outdoors in dangerous conditions.

Zhang said upgraded signaling systems have also changed daily work. Devices that once required more on-site checks can now be monitored from indoors, and track switches can be controlled remotely.

For workers on the plateau, that means fewer unnecessary trips into the wind and thin air. For train operations, it adds another layer of safety.