Witnessing original speed of 35 kilometers per hour up to 350 today, the Beijing-Zhangjiakou railway, the first designed and built by Chinese, shows the development of the country's railways and economy.
Xinhua丨Updated: May 23, 2019
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Workers are seen at the construction site of the Great Wall station of the Beijing-Zhangjiakou railway under the Badaling Great Wall area in Beijing, capital of China, Aug. 8, 2017. [Photo/Xinhua]