What keeps China's high-speed trains so steady?
By Zhao Manfeng |
chinadaily.com.cn |
Updated: 2026-10-01 07:00
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A cup of tea can stand upright on a Chinese high-speed train. But the real story isn't the cup. It's the wheel beneath the train.
At 350 km/h, the wheel diameter tolerance is tighter than a human hair. Every wheel has its own digital ID.
This National Day holiday, millions are traveling home. These wheels carry us safely to our loved ones.
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