Photo: Liu Chan/Xinhua/Landov
On 20 December, when this train made its first trip along a brand new, 20.2-kilometer section of the Chongqing rail line, which links Shapingba and Daxuecheng, it became the first in China to conserve energy with regenerative braking. Light-rail trains on this line are also the first Chinese metro trains to tip the scales at less than 35 metric tons.












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Willie Jones
Willie Jones is an associate editor at IEEE Spectrum. In addition to editing and planning daily coverage, he manages several of Spectrum's newsletters and contributes regularly to the monthly Big Picture section that appears in the print edition.
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