Across China: 70 years on, Chinese scientists preserve plateau highway on permafrost

LHASA, Dec. 23 (Xinhua) -- On the Qinghai-Xizang Plateau in China, drivers jokingly refer to a section of a highway as the "washboard road" or "a road of potholes" because it undulates like waves and driving a little faster will cause severe car bumps.

The road section, located at an average altitude of more than 4,500 meters, was built on permafrost, making the road surface prone to distortion.

This year